Notifications

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Learn about the technical aspects of notification delivery on device, including notification types, priorities, and notification center management.

Notifications Documentation

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PTT Framework Restrictions
We are attempting to update our app to use the PTT framework, as it has been made clear that this will be required in a future iOS version as opposed to using the Unrestricted VoIP entitlement we are using for several features of our app. However, the behavior of this framework poses some problems with implementing our app's functionality: It is not possible to programmatically join a channel when the app is not in the foreground. This hinders our ability to implement the Automatically activate radio stream feature of our app, which allows users who have opted into this feature to immediately begin hearing live PTT audio from their agency following an incident alert. Having the app constantly "joined to a channel" and using the restoration delegate could potentially work, however this is not ideal as this would result in the PTT UI needing to be displayed at all times, even when no radio stream is activated. We have a "Text to Speech" option that, when enabled, reads out the content of an incident alert after the alert sound has played. This currently happens by triggering an AVSpeechSynthesizer in the PushKit incoming push callback. It may be possible to render TTS audio on the fly in a Notification Service Extension and assign it as the notification's sound, if that is possible this is less of a problem. We also use the PushKit callback to, again if the user has enabled it, activate a "Shake to Respond" feature, allowing a short period of time after receiving an incident alert in which the user can shake their device to indicate that they are responding to the incident. There does not appear to be any way to have the level of background execution required to implement this using an NSE, and this is of course beyond the scope of the PTT framework. What options do we have to be able to continue to provide this functionality, without risk of it being disabled in a future iOS version?
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505
Apr ’25
Posting a local notifications (or alert) from a launch agent
My Mac app has a launch agent (within the app bundle) that works great without the app running. There are some occasions where I need to display an alert and ask the user to launch the app to handle the issue. I thought about using UNUserNotificationCenter but I'm not able to make it work from the agent. I'm asking for authorization as follows: [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert | UNAuthorizationOptionSound | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) { NSLog(@"authorization request completion. Granted: %@, error: %@ (%@)",granted?@"YES":@"NO",error, [error localizedDescription]); }]; And I'm trying to post the notification as follows: content.title = @"Your App Name"; content.body = @"Click the button to open the app"; content.sound = [UNNotificationSound defaultSound]; UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:[[NSUUID UUID] UUIDString] content:content trigger:nil]; [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) { if (error) { NSLog(@"Error showing notification: %@ %@", error, [error localizedDescription]); } }]; When running I'm getting asked to authorize, I authorize and all seems OK in system settings but I'm not able send any notifications. addNotificationRequest results in UNErrorCodeNotificationsNotAllowed error. I tried this with the authorization request inside the main app, or inside the agent, with the same results. When trying to post the notification from within the app, it does work, but that's not what I need. Is posting notifications from within the launch agent not possible at all, or is there anything here that I'm missing. TIA
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184
Oct ’25
APNS Notifications not received on macOS Device
Hello Team, We are currently experiencing an issue where some of our devices are not receiving push notifications. We are sending notifications via the Apple Push Notification portal (https://developer.apple.com/notifications/push-notifications-console/) using the following two requests. However, in both cases, the notifications are not being delivered to the devices. Scenario 1 : When we send a request with apns-push-type set to alert, we receive the following error. Request : curl -v --header "authorization: bearer ${AUTHENTICATION_TOKEN}" --header "apns-topic: com.testcompany.sampletest" --header "apns-push-type: alert" --header "apns-priority: 10" --header "apns-expiration: 0" --data '{"aps":{"alert":{"title":"Test Notification Title","subtitle":"Test Notification Sub Title","body":"Test Notification Body"}}}' --http2 https://api.push.apple.com:443/3/device/*devicetoken* Response: { "code": 400, "message": "bad-request", "reason": "The device token is inactive for the specified topic. There is no need to send further pushes to the same device token, unless your application retrieves the same device token.", "requestUuid": "c4ae39b4-87e1-4269-a1e9-163f60ec0385" } Scenario 2 : However, if we send the request with apns-push-type set to background, the request is processed successfully by APNs, but no notification is received on the device. Request : curl -v --header "authorization: bearer ${AUTHENTICATION_TOKEN}" --header "apns-topic: com.testcompany.sampletest" --header "apns-push-type: background" --header "apns-priority: 10" --header "apns-expiration: 0" --data '{"aps":{"alert":{"title":"Test Notification Title","subtitle":"Test Notification Sub Title","body":"Test Notification Body"}}}' --http2 https://api.push.apple.com:443/3/device/*devicetoken* Response: Getting a message that The notification sent successfully but no notification is received on the device. In both cases (with alert and background push types), the push notification does not reach the device. Additionally, when we validated the device token using the APNs Device Token Validator, it appears to be valid and returns the following message. "Device Token is valid for sending Alert & Background push-type notifications in the Production environment" Affected Device: macOS version : MacOS 15.3.1 Processor : Apple M1 Could you please assist me in resolving this issue? Thanks
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278
Oct ’25
Missing INITIAL_BUY notification for a single user (App Store Server Notification V2)
Hi all, We’re implementing in-app subscriptions in our iOS app using App Store Server Notifications V2 in the production environment. Everything is generally working well — we receive notifications such as DID_CHANGE_RENEWAL_STATUS, CANCELLATION, etc., and we log all incoming notifications into our own database. However, we've encountered a single case where the INITIAL_BUY notification was not received for a specific user. Interestingly, we did receive the later notifications (DID_CHANGE_RENEWAL_STATUS and CANCELLATION) for that same user. Here is our setup: App Store Server Notifications V2 Notification endpoint is stable and functioning normally (receives and logs other notifications) Notifications are reliably stored in our database The issue occurred only once for one user Environment: Production We've already contacted Apple Developer Support, but were informed that this issue is out of scope for direct support, and were directed to the Developer Forums. Our questions: Under what conditions might the INITIAL_BUY notification fail to be sent or delivered? Is there any known behavior or scenario where Apple may skip the INITIAL_BUY notification? Any recommendations on how to further investigate or verify whether it was sent from Apple’s side? We’ve confirmed that the notification never hit our server (no logs, no DB record), and our system was healthy at the time. Any insight would be greatly appreciated. Thank you!
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130
Sep ’25
Notification Service Extension is killed during startup
We are observing an issue where the iOS Notification Service Extension (NSE) is terminated by the system during startup, before either didReceive(_:withContentHandler:) or serviceExtensionTimeWillExpire(_:) is invoked. When this occurs, the notification is delivered without modification (for example, an encrypted payload is shown to the user). System logs frequently contain the message “Extension will be killed because it used its runtime in starting up”. During testing, we observed that CPU-intensive operations or heavy initialization performed early in the extension lifecycle — especially inside init() or directly on the main thread in didReceive often cause the system to kill the NSE almost immediately. These terminations happen significantly earlier than the commonly observed ~30-second execution window where the OS normally invokes serviceExtensionTimeWillExpire(_:) before ending the extension. When these early terminations occur, there is no call to the expiry handler, and the process appears to be forcefully shut down. Moving the same operations to a background thread changes the behavior: the extension eventually expires around the usual 30-second window, after which the OS calls serviceExtensionTimeWillExpire(_:). We also observed that memory usage plays a role in early termination. During tests involving large memory allocations, the system consistently killed the extension once memory consumption exceeded a certain threshold (in our measurements, this occurred around 150–180 MB). Again, unlike normal time-based expiration, the system did not call the expiry handler and no crash report was produced. Since Apple’s documentation does not specify concrete CPU, memory, or startup-cost constraints for Notification Service Extensions or any other extensions beyond the general execution limit, we are seeking clarification and best-practice guidance on expected behaviors, particularly around initialization cost and the differences between startup termination. NSE Setup: class NotificationService: UNNotificationServiceExtension { static var notificationContentHandler: ((UNNotificationContent) -> Void)? static var notificationContent: UNMutableNotificationContent? static var shoudLoop = true override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) { NotificationService.notificationContentHandler = contentHandler NotificationService.notificationContent = request.content.mutableCopy() as? UNMutableNotificationContent NotificationService.notificationContent!.title = "Weekly meeting" NotificationService.notificationContent!.body = "Updated inside didReceive" // Failing scenarios } override func serviceExtensionTimeWillExpire() { NotificationService.shoudLoop = false guard let handler = NotificationService.notificationContentHandler, let content = NotificationService.notificationContent else { return } content.body = "Updated inside serviceExtensionTimeWillExpire()" handler(content) } }
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203
Nov ’25
No notification sound when CarPlay is connected
We're building a taxi driver app. Our goal is simple: Play a notification sound when a new ride request arrives — even if the iPhone is connected to CarPlay. We use Firebase push with "sound": "default" and "interruption-level": "time-sensitive". The app requests .carPlay and uses a category with .allowInCarPlay. Everything works when CarPlay is disconnected — we get sound and banner. But when connected to CarPlay: the push is delivered silently, no sound is played (even on the phone), Siri Announce is enabled, but nothing is spoken. Questions: Is notification sound blocked when CarPlay is active, unless the app has CarPlay entitlement? Is Siri Announce the only way to notify the driver audibly in this case? Would getting a CarPlay entitlement (e.g. CarPlay.communication) fix this without building a full CarPlay UI? Thanks — all we need is a reliable sound alert when a new ride comes in.
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111
Jun ’25
Notifications False Sucecss Delivery
We operate a social network application, SportsYou with over 3 million monthly active users and are experiencing significant issues with push notification delivery through APNs. We have a large number of users reporting they are not receiving push notifications. Our infrastructure uses AWS SNS integrated with APNs to deliver notifications. However, AWS CloudWatch consistently reports successful delivery (Success response), even though users confirm they never received the notifications. Because we receive success responses from AWS SNS, our system does not attempt to recreate or refresh the device endpoints. This leaves us unable to detect or recover from these delivery failures automatically. This issue is widespread and inconsistent. It affects users across multiple variables including different iOS versions, different device models, and different versions of our application. We cannot identify a clear pattern that would help us isolate the root cause. With millions of active users, even a small percentage of delivery failures represents thousands of users experiencing a degraded service. This is significantly impacting user engagement and satisfaction. We need guidance on how to properly diagnose this issue and ensure reliable notification delivery to our users. Specifically, we'd like to understand why we're receiving success responses when notifications aren't being delivered, and what steps we can take to detect and prevent these failures.
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151
Oct ’25
Critical Alerts and Notification Permissions
Back story: I'm developing an app that communicates with a personal medical device. We use critical alerts when we have hardware issues that could result in harm to the patient. The audio file is a 30 second file to make sure the patient is aware. If the app is open when they occur, we pop up a modal message in the app. When the user dismisses the notice, we call UNNotificationCenter::removeDeliveredNotifications(withIdentifiers:) to remove the critical alert and also to stop the audio file that is playing. This normally works fine. However we discovered that if the patient leaves critical alert enabled but disables notifications for our app, that we can still post the critical alert and it goes off. However when the user dismisses the message, the removeDeliveredNotifications call does not work. I did some debugging and if call getDeliveredNotifications with this permission combination, it return 0 (normally it would return 1). Does anyone know of another way to remove the critical alert in this situation? (or should I be submitting this as a bug?)
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576
May ’25
AlarmKit plays system error tone instead of custom sound files (iOS 26.0)
AlarmKit custom sounds are universally broken in iOS 26.0 stable - instead of playing your custom sound, it plays a system error/timeout beep. I've spent days investigating why custom sounds result in what sounds like an error beep (like when you cancel an operation or hit a timeout) instead of the actual audio file. I can now prove this is an Apple bug, not implementation error. Evidence: Test 1: My Implementation Followed Apple's documentation exactly Tried both bundle and Library/Sounds (as documented) Result: System error beep (not my audio) Test 2: Professional Apps Tested ADHDAlarms (popular AlarmKit example by jacobsapps) https://github.com/jacobsapps/ADHDAlarms Their airhorn.mp3 custom sound: same error beep (not an airhorn) Their default sound: works perfectly Test 3: Device Testing Physical iPhone (iOS 26.0 - 23A341): broken iOS Simulator: broken Not device-specific Files are found correctly, but the actual audio file is never played. Instead, you hear what sounds like a system error/cancellation tone. What I've Eliminated Not a Library/Sounds vs Bundle issue (both broken) Not a file format issue (.mp3, .caf, .m4a all broken) Not an implementation issue (professional apps broken too) Not a device issue (simulator and device both broken) Not a file size issue (5KB to 2MB all broken) The Documentation Lie: Apple's docs for AlertConfiguration.AlertSound.named(_:) state: "Choose a file that's in your app's main bundle or the Library/Sounds folder" https://developer.apple.com/documentation/activitykit/alertconfiguration/alertsound/named(_:) Both locations are broken. Tested on: iOS 26.0 (23A341), Xcode 26.0.1, Swift 6.2 Impact: This affects any app trying to: Provide personalized wake-up sounds Use custom alarm tones Create meditation/sleep apps Differentiate from default iOS alarms Current Status: Multiple bug reports filed: FB19900024, FB18237648, FB19779004 Apple engineer claimed "fixed in latest beta" in August Still broken in iOS 26.0 stable (September) Workaround: None that I know of. You must use .default sound. For apps needing custom audio, play it with AVAudioPlayer after the alarm fires and user opens the app. Question: Has ANYONE gotten custom AlarmKit sounds working in iOS 26.0 stable? If so, plzzz help I'd be so grateful.
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196
Oct ’25
Push Notification Icon Not Updated on Some Devices After App Icon Change
Hi, We recently updated our app icon, but the push notification icon has not been updated on some devices. It still shows the old icon on: • iPhone 16 Pro — iOS 26 • iPhone 14 — iOS 26 • iPad Pro 11” (M4) — iOS 18.6.2 • iPhone 16 Plus — iOS 18.5 After restarting these devices, the push notification icon is refreshed and displays the new version correctly. Could you advise how we can ensure the push notification icon updates properly on all affected devices without requiring users to restart? Thank you.
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381
Jan ’26
CarPlay: no banner or sound for APNs while connected, works on phone (iOS 18.0, UNNotificationCategoryOptions.allowInCarPlay)
Hi everyone! I’m integrating push notifications for a taxi-driver app and ran into a blocking CarPlay issue. When the iPhone is connected to CarPlay (wired or wireless), the push arrives on the phone without any sound and nothing is shown or announced on the CarPlay screen. If I unplug CarPlay, the same push plays the default sound and shows a normal banner on the lock screen, so the payload itself looks valid. Environment iPhone 13 Pro, iOS 18.0 CarPlay head-unit: Xcode 16.2 CarPlay Simulator App built with Flutter 3.22 + firebase_messaging: ^15.2.5 Deployment target: iOS 14.0 Xcode capabilities enabled: Push Notifications, Time-Sensitive Notifications App settings on the device: Allow Notifications -› Sounds ON, Show in CarPlay ON Siri › Announce Notifications › CarPlay: master toggle ON + my app added to the allowed list Driving Focus = Off (same result if it’s On) Native setup in AppDelegate.swift UNUserNotificationCenter.current().requestAuthorization( options: [.alert, .sound, .badge, .carPlay] ) { _,_ in } let carPlayCategory = UNNotificationCategory( identifier: "CARPLAY_ORDER", actions: [], intentIdentifiers: [], options: [.allowInCarPlay] ) UNUserNotificationCenter.current().setNotificationCategories([carPlayCategory]) UNUserNotificationCenter.current().delegate = self application.registerForRemoteNotifications() APNs payload that I send via FCM { "aps": { "alert": { "title": "New test order", "body": "Location info test" }, "sound": "default", "category": "CARPLAY_ORDER", "interruption-level": "time-sensitive", "relevance-score": 1 } } What could be the problem? Please help me solve the error
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168
Jun ’25
Apple CarPlay Notifications - Tap action handler
I am developing a CarPlay driving tasks app and is able to display push notifications on CarPlay. I am looking at a way to get a tap action handler for push notifications on CarPlay such that when a user taps the notification and by default the app opens, but I want to present a CPInformationTemplate with data corresponding to the tapped notification.
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128
Oct ’25
/The notifications/test request was successful, but there were no notification messages from the Apple Store
requestUrl:https://api.storekit-sandbox.itunes.apple.com/inApps/v1/notifications/test method:Post responseCode:200 testNotificationToken:06beba6c-7587-44f6-a4b8-f12b11db6061_1745832671126 Request environment: ①APP from: TestFlight ②Apple acount : Sandbox account ③Apple originalTransactionId: 2000000907966801 App Store sandbox server notification configuration is fine(https://*.com/v2/apple_refund_notify), I have tried many times, but have not received any notification from Apple. Is this API not working?
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148
Apr ’25
APNS Connection Timed out
This error has been continuously occurring for about 9 hours. We have not replaced the certificate, modified the server code, or changed the firewall policy. Some requests succeed, but many are timing out, with several timeouts occurring every minute. We are unable to find the cause. Please help. APNS Exception io netty channel ConnecttimeException: Connection timed out
APNSOutboundHandler api.push.apple.com/17.188.169.28:443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 ...
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725
Apr ’25
Unknown APNs ERROR: BadEnvironmentKeyInToken when sending Push To Talk notifications
We’re sending PTT notifications from our server and are receiving HTTP 403 from APNs for certain phones with the reason field BadEnvironmentKeyInToken. I can’t find this reason documented in Apple’s public error list. I’d like to confirm what this error specifically means and how to resolve it. Any guidance or clarification would be greatly appreciated. Thank you. Here is the document I was referring to. https://developer.apple.com/library/archive/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CommunicatingwithAPNs.html
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495
Jan ’26
APNs Returning 200 OK for Uninstalled Apps Instead of 410 Error
We're experiencing an issue with Apple Push Notification service where APNs continues to return 200 OK responses for device tokens belonging to uninstalled applications. Issue Details: When sending push notifications to device tokens. APNs returns 200 OK responses even for devices where our app was uninstalled more than a month ago According to documentation(https://developer.apple.com/documentation/usernotifications/handling-notification-responses-from-apns), APNs should return 410 status code with JSON body for invalid tokens Expected Behavior: APNs should return 410 status code when device token is no longer valid (app uninstalled) Thanks in advanced for support
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136
Jul ’25
PTT Framework Restrictions
We are attempting to update our app to use the PTT framework, as it has been made clear that this will be required in a future iOS version as opposed to using the Unrestricted VoIP entitlement we are using for several features of our app. However, the behavior of this framework poses some problems with implementing our app's functionality: It is not possible to programmatically join a channel when the app is not in the foreground. This hinders our ability to implement the Automatically activate radio stream feature of our app, which allows users who have opted into this feature to immediately begin hearing live PTT audio from their agency following an incident alert. Having the app constantly "joined to a channel" and using the restoration delegate could potentially work, however this is not ideal as this would result in the PTT UI needing to be displayed at all times, even when no radio stream is activated. We have a "Text to Speech" option that, when enabled, reads out the content of an incident alert after the alert sound has played. This currently happens by triggering an AVSpeechSynthesizer in the PushKit incoming push callback. It may be possible to render TTS audio on the fly in a Notification Service Extension and assign it as the notification's sound, if that is possible this is less of a problem. We also use the PushKit callback to, again if the user has enabled it, activate a "Shake to Respond" feature, allowing a short period of time after receiving an incident alert in which the user can shake their device to indicate that they are responding to the incident. There does not appear to be any way to have the level of background execution required to implement this using an NSE, and this is of course beyond the scope of the PTT framework. What options do we have to be able to continue to provide this functionality, without risk of it being disabled in a future iOS version?
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2
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505
Activity
Apr ’25
Posting a local notifications (or alert) from a launch agent
My Mac app has a launch agent (within the app bundle) that works great without the app running. There are some occasions where I need to display an alert and ask the user to launch the app to handle the issue. I thought about using UNUserNotificationCenter but I'm not able to make it work from the agent. I'm asking for authorization as follows: [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert | UNAuthorizationOptionSound | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) { NSLog(@"authorization request completion. Granted: %@, error: %@ (%@)",granted?@"YES":@"NO",error, [error localizedDescription]); }]; And I'm trying to post the notification as follows: content.title = @"Your App Name"; content.body = @"Click the button to open the app"; content.sound = [UNNotificationSound defaultSound]; UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:[[NSUUID UUID] UUIDString] content:content trigger:nil]; [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) { if (error) { NSLog(@"Error showing notification: %@ %@", error, [error localizedDescription]); } }]; When running I'm getting asked to authorize, I authorize and all seems OK in system settings but I'm not able send any notifications. addNotificationRequest results in UNErrorCodeNotificationsNotAllowed error. I tried this with the authorization request inside the main app, or inside the agent, with the same results. When trying to post the notification from within the app, it does work, but that's not what I need. Is posting notifications from within the launch agent not possible at all, or is there anything here that I'm missing. TIA
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184
Activity
Oct ’25
APNS Notifications not received on macOS Device
Hello Team, We are currently experiencing an issue where some of our devices are not receiving push notifications. We are sending notifications via the Apple Push Notification portal (https://developer.apple.com/notifications/push-notifications-console/) using the following two requests. However, in both cases, the notifications are not being delivered to the devices. Scenario 1 : When we send a request with apns-push-type set to alert, we receive the following error. Request : curl -v --header "authorization: bearer ${AUTHENTICATION_TOKEN}" --header "apns-topic: com.testcompany.sampletest" --header "apns-push-type: alert" --header "apns-priority: 10" --header "apns-expiration: 0" --data '{"aps":{"alert":{"title":"Test Notification Title","subtitle":"Test Notification Sub Title","body":"Test Notification Body"}}}' --http2 https://api.push.apple.com:443/3/device/*devicetoken* Response: { "code": 400, "message": "bad-request", "reason": "The device token is inactive for the specified topic. There is no need to send further pushes to the same device token, unless your application retrieves the same device token.", "requestUuid": "c4ae39b4-87e1-4269-a1e9-163f60ec0385" } Scenario 2 : However, if we send the request with apns-push-type set to background, the request is processed successfully by APNs, but no notification is received on the device. Request : curl -v --header "authorization: bearer ${AUTHENTICATION_TOKEN}" --header "apns-topic: com.testcompany.sampletest" --header "apns-push-type: background" --header "apns-priority: 10" --header "apns-expiration: 0" --data '{"aps":{"alert":{"title":"Test Notification Title","subtitle":"Test Notification Sub Title","body":"Test Notification Body"}}}' --http2 https://api.push.apple.com:443/3/device/*devicetoken* Response: Getting a message that The notification sent successfully but no notification is received on the device. In both cases (with alert and background push types), the push notification does not reach the device. Additionally, when we validated the device token using the APNs Device Token Validator, it appears to be valid and returns the following message. "Device Token is valid for sending Alert & Background push-type notifications in the Production environment" Affected Device: macOS version : MacOS 15.3.1 Processor : Apple M1 Could you please assist me in resolving this issue? Thanks
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2
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1
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278
Activity
Oct ’25
Localization of NSAlarmKitUsageDescription
In the new AlarmKit API, how do you localize NSAlarmKitUsageDescription? In the case of other usage descriptions, such as NSLocationWhenInUseUsageDescription, you can use an InfoPlist.xcstrings file, but this does not appear to work for NSAlarmKitUsageDescription.
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2
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2
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191
Activity
Oct ’25
Missing INITIAL_BUY notification for a single user (App Store Server Notification V2)
Hi all, We’re implementing in-app subscriptions in our iOS app using App Store Server Notifications V2 in the production environment. Everything is generally working well — we receive notifications such as DID_CHANGE_RENEWAL_STATUS, CANCELLATION, etc., and we log all incoming notifications into our own database. However, we've encountered a single case where the INITIAL_BUY notification was not received for a specific user. Interestingly, we did receive the later notifications (DID_CHANGE_RENEWAL_STATUS and CANCELLATION) for that same user. Here is our setup: App Store Server Notifications V2 Notification endpoint is stable and functioning normally (receives and logs other notifications) Notifications are reliably stored in our database The issue occurred only once for one user Environment: Production We've already contacted Apple Developer Support, but were informed that this issue is out of scope for direct support, and were directed to the Developer Forums. Our questions: Under what conditions might the INITIAL_BUY notification fail to be sent or delivered? Is there any known behavior or scenario where Apple may skip the INITIAL_BUY notification? Any recommendations on how to further investigate or verify whether it was sent from Apple’s side? We’ve confirmed that the notification never hit our server (no logs, no DB record), and our system was healthy at the time. Any insight would be greatly appreciated. Thank you!
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2
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130
Activity
Sep ’25
Notification Service Extension is killed during startup
We are observing an issue where the iOS Notification Service Extension (NSE) is terminated by the system during startup, before either didReceive(_:withContentHandler:) or serviceExtensionTimeWillExpire(_:) is invoked. When this occurs, the notification is delivered without modification (for example, an encrypted payload is shown to the user). System logs frequently contain the message “Extension will be killed because it used its runtime in starting up”. During testing, we observed that CPU-intensive operations or heavy initialization performed early in the extension lifecycle — especially inside init() or directly on the main thread in didReceive often cause the system to kill the NSE almost immediately. These terminations happen significantly earlier than the commonly observed ~30-second execution window where the OS normally invokes serviceExtensionTimeWillExpire(_:) before ending the extension. When these early terminations occur, there is no call to the expiry handler, and the process appears to be forcefully shut down. Moving the same operations to a background thread changes the behavior: the extension eventually expires around the usual 30-second window, after which the OS calls serviceExtensionTimeWillExpire(_:). We also observed that memory usage plays a role in early termination. During tests involving large memory allocations, the system consistently killed the extension once memory consumption exceeded a certain threshold (in our measurements, this occurred around 150–180 MB). Again, unlike normal time-based expiration, the system did not call the expiry handler and no crash report was produced. Since Apple’s documentation does not specify concrete CPU, memory, or startup-cost constraints for Notification Service Extensions or any other extensions beyond the general execution limit, we are seeking clarification and best-practice guidance on expected behaviors, particularly around initialization cost and the differences between startup termination. NSE Setup: class NotificationService: UNNotificationServiceExtension { static var notificationContentHandler: ((UNNotificationContent) -> Void)? static var notificationContent: UNMutableNotificationContent? static var shoudLoop = true override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) { NotificationService.notificationContentHandler = contentHandler NotificationService.notificationContent = request.content.mutableCopy() as? UNMutableNotificationContent NotificationService.notificationContent!.title = "Weekly meeting" NotificationService.notificationContent!.body = "Updated inside didReceive" // Failing scenarios } override func serviceExtensionTimeWillExpire() { NotificationService.shoudLoop = false guard let handler = NotificationService.notificationContentHandler, let content = NotificationService.notificationContent else { return } content.body = "Updated inside serviceExtensionTimeWillExpire()" handler(content) } }
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203
Activity
Nov ’25
No notification sound when CarPlay is connected
We're building a taxi driver app. Our goal is simple: Play a notification sound when a new ride request arrives — even if the iPhone is connected to CarPlay. We use Firebase push with "sound": "default" and "interruption-level": "time-sensitive". The app requests .carPlay and uses a category with .allowInCarPlay. Everything works when CarPlay is disconnected — we get sound and banner. But when connected to CarPlay: the push is delivered silently, no sound is played (even on the phone), Siri Announce is enabled, but nothing is spoken. Questions: Is notification sound blocked when CarPlay is active, unless the app has CarPlay entitlement? Is Siri Announce the only way to notify the driver audibly in this case? Would getting a CarPlay entitlement (e.g. CarPlay.communication) fix this without building a full CarPlay UI? Thanks — all we need is a reliable sound alert when a new ride comes in.
Replies
2
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0
Views
111
Activity
Jun ’25
Notifications False Sucecss Delivery
We operate a social network application, SportsYou with over 3 million monthly active users and are experiencing significant issues with push notification delivery through APNs. We have a large number of users reporting they are not receiving push notifications. Our infrastructure uses AWS SNS integrated with APNs to deliver notifications. However, AWS CloudWatch consistently reports successful delivery (Success response), even though users confirm they never received the notifications. Because we receive success responses from AWS SNS, our system does not attempt to recreate or refresh the device endpoints. This leaves us unable to detect or recover from these delivery failures automatically. This issue is widespread and inconsistent. It affects users across multiple variables including different iOS versions, different device models, and different versions of our application. We cannot identify a clear pattern that would help us isolate the root cause. With millions of active users, even a small percentage of delivery failures represents thousands of users experiencing a degraded service. This is significantly impacting user engagement and satisfaction. We need guidance on how to properly diagnose this issue and ensure reliable notification delivery to our users. Specifically, we'd like to understand why we're receiving success responses when notifications aren't being delivered, and what steps we can take to detect and prevent these failures.
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2
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1
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151
Activity
Oct ’25
Critical Alerts and Notification Permissions
Back story: I'm developing an app that communicates with a personal medical device. We use critical alerts when we have hardware issues that could result in harm to the patient. The audio file is a 30 second file to make sure the patient is aware. If the app is open when they occur, we pop up a modal message in the app. When the user dismisses the notice, we call UNNotificationCenter::removeDeliveredNotifications(withIdentifiers:) to remove the critical alert and also to stop the audio file that is playing. This normally works fine. However we discovered that if the patient leaves critical alert enabled but disables notifications for our app, that we can still post the critical alert and it goes off. However when the user dismisses the message, the removeDeliveredNotifications call does not work. I did some debugging and if call getDeliveredNotifications with this permission combination, it return 0 (normally it would return 1). Does anyone know of another way to remove the critical alert in this situation? (or should I be submitting this as a bug?)
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2
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576
Activity
May ’25
AudioServicesPlaySystemSound on NotificationService
Can I using AudioServicesPlaySystemSound for play sound os system on NotificationService?
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2
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103
Activity
May ’25
AlarmKit plays system error tone instead of custom sound files (iOS 26.0)
AlarmKit custom sounds are universally broken in iOS 26.0 stable - instead of playing your custom sound, it plays a system error/timeout beep. I've spent days investigating why custom sounds result in what sounds like an error beep (like when you cancel an operation or hit a timeout) instead of the actual audio file. I can now prove this is an Apple bug, not implementation error. Evidence: Test 1: My Implementation Followed Apple's documentation exactly Tried both bundle and Library/Sounds (as documented) Result: System error beep (not my audio) Test 2: Professional Apps Tested ADHDAlarms (popular AlarmKit example by jacobsapps) https://github.com/jacobsapps/ADHDAlarms Their airhorn.mp3 custom sound: same error beep (not an airhorn) Their default sound: works perfectly Test 3: Device Testing Physical iPhone (iOS 26.0 - 23A341): broken iOS Simulator: broken Not device-specific Files are found correctly, but the actual audio file is never played. Instead, you hear what sounds like a system error/cancellation tone. What I've Eliminated Not a Library/Sounds vs Bundle issue (both broken) Not a file format issue (.mp3, .caf, .m4a all broken) Not an implementation issue (professional apps broken too) Not a device issue (simulator and device both broken) Not a file size issue (5KB to 2MB all broken) The Documentation Lie: Apple's docs for AlertConfiguration.AlertSound.named(_:) state: "Choose a file that's in your app's main bundle or the Library/Sounds folder" https://developer.apple.com/documentation/activitykit/alertconfiguration/alertsound/named(_:) Both locations are broken. Tested on: iOS 26.0 (23A341), Xcode 26.0.1, Swift 6.2 Impact: This affects any app trying to: Provide personalized wake-up sounds Use custom alarm tones Create meditation/sleep apps Differentiate from default iOS alarms Current Status: Multiple bug reports filed: FB19900024, FB18237648, FB19779004 Apple engineer claimed "fixed in latest beta" in August Still broken in iOS 26.0 stable (September) Workaround: None that I know of. You must use .default sound. For apps needing custom audio, play it with AVAudioPlayer after the alarm fires and user opens the app. Question: Has ANYONE gotten custom AlarmKit sounds working in iOS 26.0 stable? If so, plzzz help I'd be so grateful.
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2
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196
Activity
Oct ’25
Push Notification Icon Not Updated on Some Devices After App Icon Change
Hi, We recently updated our app icon, but the push notification icon has not been updated on some devices. It still shows the old icon on: • iPhone 16 Pro — iOS 26 • iPhone 14 — iOS 26 • iPad Pro 11” (M4) — iOS 18.6.2 • iPhone 16 Plus — iOS 18.5 After restarting these devices, the push notification icon is refreshed and displays the new version correctly. Could you advise how we can ensure the push notification icon updates properly on all affected devices without requiring users to restart? Thank you.
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2
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1
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381
Activity
Jan ’26
CarPlay: no banner or sound for APNs while connected, works on phone (iOS 18.0, UNNotificationCategoryOptions.allowInCarPlay)
Hi everyone! I’m integrating push notifications for a taxi-driver app and ran into a blocking CarPlay issue. When the iPhone is connected to CarPlay (wired or wireless), the push arrives on the phone without any sound and nothing is shown or announced on the CarPlay screen. If I unplug CarPlay, the same push plays the default sound and shows a normal banner on the lock screen, so the payload itself looks valid. Environment iPhone 13 Pro, iOS 18.0 CarPlay head-unit: Xcode 16.2 CarPlay Simulator App built with Flutter 3.22 + firebase_messaging: ^15.2.5 Deployment target: iOS 14.0 Xcode capabilities enabled: Push Notifications, Time-Sensitive Notifications App settings on the device: Allow Notifications -› Sounds ON, Show in CarPlay ON Siri › Announce Notifications › CarPlay: master toggle ON + my app added to the allowed list Driving Focus = Off (same result if it’s On) Native setup in AppDelegate.swift UNUserNotificationCenter.current().requestAuthorization( options: [.alert, .sound, .badge, .carPlay] ) { _,_ in } let carPlayCategory = UNNotificationCategory( identifier: "CARPLAY_ORDER", actions: [], intentIdentifiers: [], options: [.allowInCarPlay] ) UNUserNotificationCenter.current().setNotificationCategories([carPlayCategory]) UNUserNotificationCenter.current().delegate = self application.registerForRemoteNotifications() APNs payload that I send via FCM { "aps": { "alert": { "title": "New test order", "body": "Location info test" }, "sound": "default", "category": "CARPLAY_ORDER", "interruption-level": "time-sensitive", "relevance-score": 1 } } What could be the problem? Please help me solve the error
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2
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168
Activity
Jun ’25
Apple CarPlay Notifications - Tap action handler
I am developing a CarPlay driving tasks app and is able to display push notifications on CarPlay. I am looking at a way to get a tap action handler for push notifications on CarPlay such that when a user taps the notification and by default the app opens, but I want to present a CPInformationTemplate with data corresponding to the tapped notification.
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2
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128
Activity
Oct ’25
/The notifications/test request was successful, but there were no notification messages from the Apple Store
requestUrl:https://api.storekit-sandbox.itunes.apple.com/inApps/v1/notifications/test method:Post responseCode:200 testNotificationToken:06beba6c-7587-44f6-a4b8-f12b11db6061_1745832671126 Request environment: ①APP from: TestFlight ②Apple acount : Sandbox account ③Apple originalTransactionId: 2000000907966801 App Store sandbox server notification configuration is fine(https://*.com/v2/apple_refund_notify), I have tried many times, but have not received any notification from Apple. Is this API not working?
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2
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148
Activity
Apr ’25
APNS Connection Timed out
This error has been continuously occurring for about 9 hours. We have not replaced the certificate, modified the server code, or changed the firewall policy. Some requests succeed, but many are timing out, with several timeouts occurring every minute. We are unable to find the cause. Please help. APNS Exception io netty channel ConnecttimeException: Connection timed out
APNSOutboundHandler api.push.apple.com/17.188.169.28:443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 ...
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2
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725
Activity
Apr ’25
Unknown APNs ERROR: BadEnvironmentKeyInToken when sending Push To Talk notifications
We’re sending PTT notifications from our server and are receiving HTTP 403 from APNs for certain phones with the reason field BadEnvironmentKeyInToken. I can’t find this reason documented in Apple’s public error list. I’d like to confirm what this error specifically means and how to resolve it. Any guidance or clarification would be greatly appreciated. Thank you. Here is the document I was referring to. https://developer.apple.com/library/archive/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CommunicatingwithAPNs.html
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2
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2
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495
Activity
Jan ’26
Does UNCalendarNotificationTrigger fire at the same time everyday even if user changes his timezone ?
I am using UNCalendarNotificationTrigger and from my initial tests with simulator and timezone changes in my mac i see that notification donot get triggered at specific times if timezone changes, is this expected behaviour ?
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2
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283
Activity
Jan ’26
User changes Settings for my app, any notification?
User is using my app, the goes to System Settings, and changes some of my App's settings (switches, text fields, etc). Does the system send my app any kind of notification? David PS: I tried all kinds of searches on this and found nothing.
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2
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183
Activity
May ’25
APNs Returning 200 OK for Uninstalled Apps Instead of 410 Error
We're experiencing an issue with Apple Push Notification service where APNs continues to return 200 OK responses for device tokens belonging to uninstalled applications. Issue Details: When sending push notifications to device tokens. APNs returns 200 OK responses even for devices where our app was uninstalled more than a month ago According to documentation(https://developer.apple.com/documentation/usernotifications/handling-notification-responses-from-apns), APNs should return 410 status code with JSON body for invalid tokens Expected Behavior: APNs should return 410 status code when device token is no longer valid (app uninstalled) Thanks in advanced for support
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2
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136
Activity
Jul ’25