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

Posts under Notifications subtopic

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Live Caller ID Lookup — What’s the automatic refresh cadence for config/PIR parameters? Best way to prompt updates?
Hi Apple team, We’re shipping a Live Caller ID Lookup extension on iOS 18 and have a question about the automatic refresh of configuration/PIR parameters. Questions 1. Is there any documented interval/TTL (min/max) for the system’s automatic refresh of /config and PIR parameters, or is it entirely opportunistic (battery/network/usage)? I can’t find a cadence in the IdentityLookup docs. 2. Does iOS honor server cache headers (e.g., Cache-Control/Expires) to influence when it re-fetches? 3. Which events also trigger a refresh (enable/disable in Settings, OS/app update, device reboot, token/epoch change)? 4. Are there rate limits or best-practice limits for calling refreshExtensionContext and refreshPIRParameters?
0
0
112
Sep ’25
Limit on consecutive push notifications (normal and critical alerts)
Hi, We have a use case where our app needs to send repeated push notifications (both normal and critical alerts) to inform the user about a critical device state and grab their attention. Since iOS doesn’t allow us to schedule local notifications beyond 30 seconds, I need to send multiple pushes from the server side. My questions are: Is there any documented limit on how many push notifications can be sent back-to-back before Apple starts throttling or restricting them? Are critical alerts treated differently from normal notifications in terms of delivery restrictions or frequency limits? Is there a recommended approach for handling scenarios where repeated urgent notifications are necessary to keep the user informed? I want to make sure I’m following Apple’s guidelines and not risking rejection during review.
1
0
130
Sep ’25
Server notifications v2 UNSUCCESSFUL_HTTP_RESPONSE_CODE
Hello. I'm currently implementing Apple Notification v2 to prepare for refunds for in-app purchases, but I'm not receiving requests from Apple servers to my backend server. I've applied HTTPS (TLS 1.2) and correctly registered production/sandbox notification URLs on App Store Connect. After requesting a test notification, when I check the status of testNotificationToken, I receive an UNSUCCESSFUL_HTTP_RESPONSE_CODE as follows: {"signedPayload":"......":[{"atteptDate":1752128001970,"sendAttemptResult":"UNSUCCESSFUL_HTTP_RESPONSE_CODE"}]} The endpoint for receiving notifications is set to accept POST requests with application/json format, and it responds with 200 (OK) without any content. However, Apple notifications are not coming through. Could anyone help me with this issue?
1
0
92
Jul ’25
[App Store Server Notifications] ONE_TIME_CHARGE production release...
Dear Apple! During WWDC24 you announced that ONE_TIME_CHARGE notification is available on the sandbox environment and will be available "it will be available in production later this year" - it's March 2025 and there is still no production release of this feature. Could you share some timeline and plans for when we can expect that feature deployed to production? Thanks in advance!
1
0
108
May ’25
Detecting Notification Banners, DND, and other screen anomalies
Is there a public method to know when an APNS has appeared on the screen? wrapping up a very high end photogrammetry app, using the front facing camera and screen illumination- incoming notifications completely throw off the math. Ideally, it would be great to turn on Do Not Disturb for the short process, but we’d settle for just the detection of the notification banner. also: extra credit - programattically adjusting Auto Dimming, and True Tone would be lovely too.
0
0
74
May ’25
Using notifyUserWithHaptic for Background Alarms in Standalone Watch App
I’m building a standalone Apple Watch smart alarm app that should trigger alarms on the watch in response to Bluetooth or internet events. This means the app operates in the background and attempts to trigger an alarm when such an event occurs. As far as I know, the appropriate API for this is WKExtendedRuntimeSession.notifyUserWithHaptic:repeatHandler. However, I can’t seem to start an extended runtime session while the app is in the background. I’m getting the following error: -[WKExtendedRuntimeSession _invalidationReasonAndDelegateCallbackErrorForError:outCallbackError:]:729: WKExtendedRuntimeSession hit internal error. Error Domain=com.apple.CarouselServices.SessionErrorDomain Code=17 "startSession cannot be called on a scheduled session" UserInfo={NSLocalizedDescription=startSession cannot be called on a scheduled session} Calling notifyUserWithHaptic directly also similarly fails. It seems notifyUserWithHaptic is intended to be scheduled during a foreground session to trigger at a later time, rather than being called ad hoc from a background context. Is there any way to create a proper alarm view on the Apple Watch from a background execution context?
0
0
164
Jul ’25
AlarmKit alarm UI strings are lost after updating OS
I have a working AlarmKit app, but I've noticed that after any iOS update (e.g. the 26.0.1 update from a few days ago), my scheduled alarms seem to lose their UI strings, so instead of the Stop button saying "Stop", it says "alarm_ui_stop_button" (which is my localization key for the button text). If I delete the alarm and re-add it, then it works again... until the next software update. It seems like OS updates are interfering with the link between scheduled alarms and app localization strings, which I believe are dynamically looked up at alarm time (not at configuration time). I am settings the strings in the standard way like this: AlarmManager.AlarmConfiguration( schedule: .fixed(date), attributes: AlarmAttributes<SDAlarmMetadata>( presentation: AlarmPresentation( alert: AlarmPresentation.Alert( title: "alarm_ui_title", stopButton: .init(text: "alarm_ui_stop_button", textColor: .yellow, systemImageName: "xmark") ) ), metadata: SDAlarmMetadata(title: title, subtitle: subtitle), tintColor: .yellow ), sound: .default ) Has anyone else noticed this or found a workaround? I guess I could use localization keys that are identical to the desired text, but this would only work for one language.
3
0
205
Oct ’25
PushKit (VoIP) delivery issue — user’s device fails to receive VoIP pushes; logging in on that device suppresses VoIP pushes for all devices of that user
We are facing an issue where VoIP notifications are not delivered to a user's device. If we login with the user credentials on another device the VoIP notifications are being received, if he logs in on his device VoIP notifications are not being received anymore on all devices. So When the user logs in on the affected device, all devices on that account stop receiving VoIP pushes (including the affected one). Logging out on the affected device restores delivery to other devices. What could cause this issue? It's only happening for this user so the configuration and mobile app PushKit code is working as intended.
1
0
194
Oct ’25
No "Unregistered" Error Returned for Background Notifications
Hi team, We've observed that for all background notifications (where content-available set to true, https://developer.apple.com/documentation/usernotifications/pushing-background-updates-to-your-app#Create-a-background-notification), we never received any response with error string "Unregistered". This differs from non-background pushes, where expired tokens are regularly cleared. Is this the expected behavior (i.e., background notifications will not return an "Unregistered" error), or could this indicate an issue on our side? Thanks in advance for any clarification.
1
0
220
Jul ’25
Issue in background notification iOS 18
Issue: I am making an application that stores data locally from notifications fired from the server. Everything works fine in the foreground but the background is having problems with not being triggered when notifications are fired. So we tried firing 2 notifications at the same time, including default and silent types. But the problem continues to arise on ios 18, when firing multiple times like that, the trigger is not handling all notifications, leading to data loss. I tried on ios 15 and it worked fine. Environment: Device or Simulator: Iphone 11 pro max (iOS 18.3.2 Steps to Reproduce: Open app, allow received notification. Move app to background mode or terminate app. Sent 2 notifications: a. Default notification payload: { "aps": { "content-available": 1 }, ”notification”: {…}, “alert”: {..}, “data": "some_value" } b. Silent notification payload: { "aps": { "content-available": 1 }, ”data": "some_value" } What I've Tried: Trigger notification in function: application(_:didReceiveRemoteNotification:fetchCompletionHandler:) Handle write data to local storage in above function, put it in background thread also. Thanks in advance!
2
0
464
Oct ’25
APNs keep returning unregistered token
Hi, we've observed a weird behavior for a small amount of our user that we keep receiving the same token from APNs despite it's shown as Unregistered. When we try to send push to the token, we got an Unregistered error so we remove that token from our server. However, later we would receive an add token request from the client with the same token we just removed, and when we try to send to the token it returns Unregistered again so we remove the token again. This happened 3 times for a user in an hour. The identifierForVendor remains the same for all the requests. We also owns the client and I've checked client code that it's sending the token it received from didRegisterForRemoteNotificationsWithDeviceToken to the server.
3
0
2k
Nov ’25
Not receiving apple server notification v2 on production URL
Hello, previously i have tested the purchase via test flight and the server notification was sent to my sandbox url. Now when I made the purchase from live app, my server did not receive any notification even though the production url was the same as the sandbox url. The purchase was for a consumable product. Please help, thanks.
2
0
564
May ’25
Silent Push notifications XCode 16.3 stop working on production
Hello, we have recently started signing and building our applications using Xcode 16.3. Since we made this change, we’ve noticed that the applications have stopped receiving silent push notifications (content-available: 1) when they are distributed via TestFlight or the App Store, even though we haven’t changed anything in the way these notifications are sent. As I mentioned, this started happening after migrating our project from Xcode 15 to Xcode 16.3. Regular push notifications are still working as expected, but silent ones are not being received by the apps. We are desperate because we rely on these silent notifications to inform the apps of updates, and we haven’t been able to identify the root cause of the issue.
2
0
105
May ’25
Push Notifications
以下の問題が発生しています: 特定のデバイスでプッシュ通知が受信されません。 考えられる原因は何でしょうか? プッシュ通知は自社のサーバーから送信しており、APNs(Apple Push Notification service)からは正常な応答が返ってきています。 ユーザーはデバイスで通知が有効になっていることを確認しており、ネットワークの問題も報告されていません。 この問題は複数のユーザーに発生しています。
1
0
105
Jul ’25
Can iOS automatically launch an app or show a screen upon receiving a push notification (including critical alerts)?
Hi all, May I please ask for an official clarification or documentation reference from Apple regarding this scenario: Is it possible for an iOS app to automatically launch or open a specific screen when a push notification is received — while the app is in the background or terminated (killed) state? I understand that for most cases, user interaction (such as tapping the notification) is required before the app can show UI. However, I’d like to confirm whether this is also true for time-sensitive or critical alert notifications, including emergency use cases (e.g. public safety alerts). Specifically: Can a critical alert notification directly launch the app or present a view controller? Or is user interaction always required before the app can present any UI, even with the critical alert entitlement? I would appreciate if anyone — especially Apple staff or engineers — could share an official Apple document or statement that confirms this behavior. Thank you very much! (Use case context: I’m developing an emergency broadcast feature for a property management / tenant app.)
1
0
171
Oct ’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.
2
0
133
Oct ’25
Live Caller ID Lookup — What’s the automatic refresh cadence for config/PIR parameters? Best way to prompt updates?
Hi Apple team, We’re shipping a Live Caller ID Lookup extension on iOS 18 and have a question about the automatic refresh of configuration/PIR parameters. Questions 1. Is there any documented interval/TTL (min/max) for the system’s automatic refresh of /config and PIR parameters, or is it entirely opportunistic (battery/network/usage)? I can’t find a cadence in the IdentityLookup docs. 2. Does iOS honor server cache headers (e.g., Cache-Control/Expires) to influence when it re-fetches? 3. Which events also trigger a refresh (enable/disable in Settings, OS/app update, device reboot, token/epoch change)? 4. Are there rate limits or best-practice limits for calling refreshExtensionContext and refreshPIRParameters?
Replies
0
Boosts
0
Views
112
Activity
Sep ’25
supported displaying a red dot on notifications with no indication number
I wanted to know if Apple ever supported displaying a red dot on notificationswith no indication number.
Replies
0
Boosts
0
Views
56
Activity
May ’25
Limit on consecutive push notifications (normal and critical alerts)
Hi, We have a use case where our app needs to send repeated push notifications (both normal and critical alerts) to inform the user about a critical device state and grab their attention. Since iOS doesn’t allow us to schedule local notifications beyond 30 seconds, I need to send multiple pushes from the server side. My questions are: Is there any documented limit on how many push notifications can be sent back-to-back before Apple starts throttling or restricting them? Are critical alerts treated differently from normal notifications in terms of delivery restrictions or frequency limits? Is there a recommended approach for handling scenarios where repeated urgent notifications are necessary to keep the user informed? I want to make sure I’m following Apple’s guidelines and not risking rejection during review.
Replies
1
Boosts
0
Views
130
Activity
Sep ’25
Server notifications v2 UNSUCCESSFUL_HTTP_RESPONSE_CODE
Hello. I'm currently implementing Apple Notification v2 to prepare for refunds for in-app purchases, but I'm not receiving requests from Apple servers to my backend server. I've applied HTTPS (TLS 1.2) and correctly registered production/sandbox notification URLs on App Store Connect. After requesting a test notification, when I check the status of testNotificationToken, I receive an UNSUCCESSFUL_HTTP_RESPONSE_CODE as follows: {"signedPayload":"......":[{"atteptDate":1752128001970,"sendAttemptResult":"UNSUCCESSFUL_HTTP_RESPONSE_CODE"}]} The endpoint for receiving notifications is set to accept POST requests with application/json format, and it responds with 200 (OK) without any content. However, Apple notifications are not coming through. Could anyone help me with this issue?
Replies
1
Boosts
0
Views
92
Activity
Jul ’25
when subscription renewing, which than faster?
When subscription renewing , can do purchase_date faster than notification_date quickly? I received my app user purchase notification this purchase date is 2025-08-31 06:42:54(UTC) but notification date is 2025-08-30 22:45:01(UTC) how can you do this? I can't understand it please let me explain
Replies
0
Boosts
0
Views
74
Activity
Oct ’25
[App Store Server Notifications] ONE_TIME_CHARGE production release...
Dear Apple! During WWDC24 you announced that ONE_TIME_CHARGE notification is available on the sandbox environment and will be available "it will be available in production later this year" - it's March 2025 and there is still no production release of this feature. Could you share some timeline and plans for when we can expect that feature deployed to production? Thanks in advance!
Replies
1
Boosts
0
Views
108
Activity
May ’25
Detecting Notification Banners, DND, and other screen anomalies
Is there a public method to know when an APNS has appeared on the screen? wrapping up a very high end photogrammetry app, using the front facing camera and screen illumination- incoming notifications completely throw off the math. Ideally, it would be great to turn on Do Not Disturb for the short process, but we’d settle for just the detection of the notification banner. also: extra credit - programattically adjusting Auto Dimming, and True Tone would be lovely too.
Replies
0
Boosts
0
Views
74
Activity
May ’25
Using notifyUserWithHaptic for Background Alarms in Standalone Watch App
I’m building a standalone Apple Watch smart alarm app that should trigger alarms on the watch in response to Bluetooth or internet events. This means the app operates in the background and attempts to trigger an alarm when such an event occurs. As far as I know, the appropriate API for this is WKExtendedRuntimeSession.notifyUserWithHaptic:repeatHandler. However, I can’t seem to start an extended runtime session while the app is in the background. I’m getting the following error: -[WKExtendedRuntimeSession _invalidationReasonAndDelegateCallbackErrorForError:outCallbackError:]:729: WKExtendedRuntimeSession hit internal error. Error Domain=com.apple.CarouselServices.SessionErrorDomain Code=17 "startSession cannot be called on a scheduled session" UserInfo={NSLocalizedDescription=startSession cannot be called on a scheduled session} Calling notifyUserWithHaptic directly also similarly fails. It seems notifyUserWithHaptic is intended to be scheduled during a foreground session to trigger at a later time, rather than being called ad hoc from a background context. Is there any way to create a proper alarm view on the Apple Watch from a background execution context?
Replies
0
Boosts
0
Views
164
Activity
Jul ’25
AlarmKit alarm UI strings are lost after updating OS
I have a working AlarmKit app, but I've noticed that after any iOS update (e.g. the 26.0.1 update from a few days ago), my scheduled alarms seem to lose their UI strings, so instead of the Stop button saying "Stop", it says "alarm_ui_stop_button" (which is my localization key for the button text). If I delete the alarm and re-add it, then it works again... until the next software update. It seems like OS updates are interfering with the link between scheduled alarms and app localization strings, which I believe are dynamically looked up at alarm time (not at configuration time). I am settings the strings in the standard way like this: AlarmManager.AlarmConfiguration( schedule: .fixed(date), attributes: AlarmAttributes<SDAlarmMetadata>( presentation: AlarmPresentation( alert: AlarmPresentation.Alert( title: "alarm_ui_title", stopButton: .init(text: "alarm_ui_stop_button", textColor: .yellow, systemImageName: "xmark") ) ), metadata: SDAlarmMetadata(title: title, subtitle: subtitle), tintColor: .yellow ), sound: .default ) Has anyone else noticed this or found a workaround? I guess I could use localization keys that are identical to the desired text, but this would only work for one language.
Replies
3
Boosts
0
Views
205
Activity
Oct ’25
PushKit (VoIP) delivery issue — user’s device fails to receive VoIP pushes; logging in on that device suppresses VoIP pushes for all devices of that user
We are facing an issue where VoIP notifications are not delivered to a user's device. If we login with the user credentials on another device the VoIP notifications are being received, if he logs in on his device VoIP notifications are not being received anymore on all devices. So When the user logs in on the affected device, all devices on that account stop receiving VoIP pushes (including the affected one). Logging out on the affected device restores delivery to other devices. What could cause this issue? It's only happening for this user so the configuration and mobile app PushKit code is working as intended.
Replies
1
Boosts
0
Views
194
Activity
Oct ’25
No "Unregistered" Error Returned for Background Notifications
Hi team, We've observed that for all background notifications (where content-available set to true, https://developer.apple.com/documentation/usernotifications/pushing-background-updates-to-your-app#Create-a-background-notification), we never received any response with error string "Unregistered". This differs from non-background pushes, where expired tokens are regularly cleared. Is this the expected behavior (i.e., background notifications will not return an "Unregistered" error), or could this indicate an issue on our side? Thanks in advance for any clarification.
Replies
1
Boosts
0
Views
220
Activity
Jul ’25
Issue in background notification iOS 18
Issue: I am making an application that stores data locally from notifications fired from the server. Everything works fine in the foreground but the background is having problems with not being triggered when notifications are fired. So we tried firing 2 notifications at the same time, including default and silent types. But the problem continues to arise on ios 18, when firing multiple times like that, the trigger is not handling all notifications, leading to data loss. I tried on ios 15 and it worked fine. Environment: Device or Simulator: Iphone 11 pro max (iOS 18.3.2 Steps to Reproduce: Open app, allow received notification. Move app to background mode or terminate app. Sent 2 notifications: a. Default notification payload: { "aps": { "content-available": 1 }, ”notification”: {…}, “alert”: {..}, “data": "some_value" } b. Silent notification payload: { "aps": { "content-available": 1 }, ”data": "some_value" } What I've Tried: Trigger notification in function: application(_:didReceiveRemoteNotification:fetchCompletionHandler:) Handle write data to local storage in above function, put it in background thread also. Thanks in advance!
Replies
2
Boosts
0
Views
464
Activity
Oct ’25
APNs keep returning unregistered token
Hi, we've observed a weird behavior for a small amount of our user that we keep receiving the same token from APNs despite it's shown as Unregistered. When we try to send push to the token, we got an Unregistered error so we remove that token from our server. However, later we would receive an add token request from the client with the same token we just removed, and when we try to send to the token it returns Unregistered again so we remove the token again. This happened 3 times for a user in an hour. The identifierForVendor remains the same for all the requests. We also owns the client and I've checked client code that it's sending the token it received from didRegisterForRemoteNotificationsWithDeviceToken to the server.
Replies
3
Boosts
0
Views
2k
Activity
Nov ’25
Not receiving apple server notification v2 on production URL
Hello, previously i have tested the purchase via test flight and the server notification was sent to my sandbox url. Now when I made the purchase from live app, my server did not receive any notification even though the production url was the same as the sandbox url. The purchase was for a consumable product. Please help, thanks.
Replies
2
Boosts
0
Views
564
Activity
May ’25
Silent Push notifications XCode 16.3 stop working on production
Hello, we have recently started signing and building our applications using Xcode 16.3. Since we made this change, we’ve noticed that the applications have stopped receiving silent push notifications (content-available: 1) when they are distributed via TestFlight or the App Store, even though we haven’t changed anything in the way these notifications are sent. As I mentioned, this started happening after migrating our project from Xcode 15 to Xcode 16.3. Regular push notifications are still working as expected, but silent ones are not being received by the apps. We are desperate because we rely on these silent notifications to inform the apps of updates, and we haven’t been able to identify the root cause of the issue.
Replies
2
Boosts
0
Views
105
Activity
May ’25
Push Notifications
以下の問題が発生しています: 特定のデバイスでプッシュ通知が受信されません。 考えられる原因は何でしょうか? プッシュ通知は自社のサーバーから送信しており、APNs(Apple Push Notification service)からは正常な応答が返ってきています。 ユーザーはデバイスで通知が有効になっていることを確認しており、ネットワークの問題も報告されていません。 この問題は複数のユーザーに発生しています。
Replies
1
Boosts
0
Views
105
Activity
Jul ’25
UNNotificationAttachment Sub-Optimal File Type Check
UNNotificationAttachment convenience init method seems to be checking for supported file types based on the extension of the file URL provided as a constructor parameter. This seems to be sub-optimal at best and incorrect at worst. Is this is a known issue for which a bug already exists?
Replies
1
Boosts
0
Views
106
Activity
Oct ’25
Notifications. Where can I set which type of notifications I want to receive
I dont want my server to be spammed. Currently I am only in payment-related notifs (eg: user successfully renewed his subscription, user didnt successfully renew his subscriptions, ..) Where can I set that?
Replies
1
Boosts
0
Views
52
Activity
Jul ’25
Can iOS automatically launch an app or show a screen upon receiving a push notification (including critical alerts)?
Hi all, May I please ask for an official clarification or documentation reference from Apple regarding this scenario: Is it possible for an iOS app to automatically launch or open a specific screen when a push notification is received — while the app is in the background or terminated (killed) state? I understand that for most cases, user interaction (such as tapping the notification) is required before the app can show UI. However, I’d like to confirm whether this is also true for time-sensitive or critical alert notifications, including emergency use cases (e.g. public safety alerts). Specifically: Can a critical alert notification directly launch the app or present a view controller? Or is user interaction always required before the app can present any UI, even with the critical alert entitlement? I would appreciate if anyone — especially Apple staff or engineers — could share an official Apple document or statement that confirms this behavior. Thank you very much! (Use case context: I’m developing an emergency broadcast feature for a property management / tenant app.)
Replies
1
Boosts
0
Views
171
Activity
Oct ’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.
Replies
2
Boosts
0
Views
133
Activity
Oct ’25