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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Is it possible to increase priority of background notifications?
I have an app that pairs with a wearable Bluetooth device that collects users' health data. My web backend sends two push notifications every hour to all app users—one at XX:05 and another at XX:15. The first notification instructs the app to download data from the paired wearable device, while the second prompts the app to upload the downloaded data to the backend server's database. However, I’ve noticed that many push notifications are not processed by iOS apps, especially at night. Based on Apple's documentation, iOS prioritizes push notifications and may ignore lower-priority ones to conserve battery life. Is there a way to increase the priority to ensure that more (or all) push notifications are processed? Would integrating the HealthKit framework help? Currently, I use Firebase Cloud Messaging (FCM) to send push notifications. Additionally, my app falls under the Health & Fitness category. Would changing it to Medical increase priority? P.S. I understand that Apple requires certain certifications for an app to be classified as Medical.
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301
Feb ’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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558
May ’25
Regarding the change of device tokens after an iOS update
In the app we are developing, we update the device token upon app launch using didRegisterForRemoteNotificationsWithDeviceToken. Previously, after an iOS major update, if the app was left without being launched, users experienced an issue where notifications would not be received. Later, we confirmed that running didRegisterForRemoteNotificationsWithDeviceToken during app launch updates the device token and restores the ability to receive notifications. Therefore, we believe that the device token may change due to an iOS major update. We want to understand the detailed conditions under which the device token is updated due to an iOS update: Does the same issue occur after iOS minor updates as well? Does it always happen during iOS major updates? We reviewed the official documentation, but there was no detailed description of the device token update conditions. Additionally, we contacted Apple, but received no clear answers. If anyone has experienced the same situation, we would appreciate any information you can share.
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161
Jun ’25
Local-only iOS Notifications
Hello! I'm currently trying to add local push notifications to my iOS app (React Native + Expo). Most of the guides and documentation I found online revolve around remote notification capabilities and APNS - I don't need this. The app will register a background task to periodically check if it should trigger a notification, fully local. I'm running into issues when adding the push notification capabilities, saying I need a new provisioning profile and to modify the App ID, which prompts me to set up certificates to communicate with APNS - which I don't need. So I was wondering: Is it possible to build an app without the remote notification setup that can still trigger local notifications? Or is it kind of all-or-nothing, and I need to set up remote notifications as well even if I only need to trigger them locally? Couldn't really find much online about this, and before I invalidate my current certificates and go through a bunch of redundant setup, I thought I'd ask here. Help would be greatly appreciated! Thank you!
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89
Jun ’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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153
Oct ’25
How to Enable com.apple.developer.pushkit.unrestricted-voip Entitlement for Production App?
We are developing a walkie-talkie style iOS app using CallKit and PushKit for real-time voice communication. The app is intended for internal company use and requires unrestricted VoIP push capabilities to reliably deliver incoming call alerts, even in background or locked states. Our app's use case follows Apple’s guidelines, and we are not using PushKit for messaging or background data. We have already enabled "Push Notifications" in Capabilities and confirmed the provisioning profile, but are unable to enable com.apple.developer.pushkit.unrestricted-voip. Could someone from Apple or the community advise on the current process to request this entitlement for a production app? Developer Team ID: 3KX7Q4LX88 App Bundle ID: com.ksc-sys.rcc.TakumiTalk Developer Name: KOHEI TAKAOKA Company: R C C, Y.K
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119
Jun ’25
Push Notification Certificate Updates
Hello, I received this message below. I reached out to support but they said they can not help with something this specific. Any organization in the same boat? Which of the certificates in the provided link should I use? Hello, We’re reaching out with a final reminder that the Certification Authority (CA) for Apple Push Notification service (APNs) is changing. APNs updated the server certificates in sandbox on January 21, 2025. APNs production server certificates will be updated on February 24, 2025. To continue using APNs without interruption, you’ll need to update your application’s Trust Store to include the new server certificate: SHA-2 Root: USERTrust RSA Certification Authority certificate. To ensure a smooth transition and avoid push notification delivery failures, please make sure that both old and new server certificates are included in the Trust Store before the cut-off date for each of your application servers that connect to sandbox and production. At this time, you don’t need to update the APNs SSL provider certificates issued to you by Apple.
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2.4k
Feb ’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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709
Apr ’25
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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157
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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116
Oct ’25
Extend of notification content
In iOS 26, I can check the notification that arrives to the user when the AirPods or Apple Watch is fully charged. When tap the notification, notification only expands and does not include actions such as moving to an app. I checked the documents of UserNotification and UNNotificationServiceExtension, but I couldn't find what I wanted. I can expand by long-tapping as default, but I'm looking for a way to expand it without entering the app when I tap the notification. I wonder if there is an API that I missed or if it's not publicly supported. thank you for your support.
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119
Sep ’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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112
Sep ’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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99
Jun ’25
Action Required: Apple Push Notification Service Server Certificate Update
Hi, We received the following message. Hello, We’re reaching out with a final reminder that the Certification Authority (CA) for Apple Push Notification service (APNs) is changing. APNs updated the server certificates in sandbox on January 21, 2025. APNs production server certificates will be updated on February 24, 2025. To continue using APNs without interruption, you’ll need to update your application’s Trust Store to include the new server certificate: SHA-2 Root: USERTrust RSA Certification Authority certificate. Note, that we are using Firebase to deliver push notifications and the connection is done via APN keys, not certificates. Is there anything that we need to update in the application to mitigate the risk of not delivered push notes ?
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1.2k
Feb ’25
Critical Messaging Intermittent Success with notSupported
Hello, I am trying to utilize the Critical Messaging API to allow my user to message 1 or multiple pre registered contacts automatically. An issue I am having with this in testing is that when the application attempts to fire off texts to the phone numbers the success rate changes from trial to trial, with no variable changing. Sometimes I can send a Critical Message to multiple phone numbers in rapid succession, sometimes the message is only sent to 1 contact, and sometimes I get no successes. Each failure always returns the MSCriticalMessaging.notSupported error. The API documentation states, "The send(_:to:) method only works if the app is backgrounded, if it’s called from foreground the framework returns a MSCriticalMessagingError.notSupported error." If my app is always backgrounded in these tests, what other issues may cause this notSupported error return, and why does the outcomes success rate vary?
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195
Sep ’25
Push payload is not present on notification tap
I am checking if the user taps on the firebase push notification and get the payload. override func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) { let userInfo = response.notification.request.content.userInfo os_log("notification tapped %{public}@", log: OSLog.push, type: .info, userInfo) handleNotificationPayload(userInfo as! [String: AnyObject]) setFlutterLinkClickedVariable() } My use case is in app terminated state when push notification is tapped, get the link from payload and navigate to corresponding screen based on the link. This is working when there is only one push notification. When there are multiple push notifications with different links in the payload, only the first notification I tap works. Rest of the notifications just launches the app and does not navigate because the link is not set. I am getting the link from the payload and invoking flutter code which sets the link in the user defaults (shared preferences) and when the app launches in the home screen it checks for this variable and navigates accordingly. func handleNotificationPayload(_ payload: [String: AnyObject]) { if let link = payload["link"] as? String { setFlutterLinkVariable(link) } } override func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { os_log("app did receive remote notification %{public}@", log: OSLog.push, type: .info, userInfo) handleNotificationPayload(userInfo as! [String : AnyObject]) completionHandler(.newData) } Currently when there is only one push notification it works because the link is set from the above method. The click delegate is not calling. I did set the delegate in application(:didFinishLaunchingWithOptions). UNUserNotificationCenter.current().delegate = self application.registerForRemoteNotifications() How to solve this issue? Thanks.
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779
Apr ’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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133
Jul ’25