Delve into the world of built-in app and system services available to developers. Discuss leveraging these services to enhance your app's functionality and user experience.

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[Texas SB 2420] How to Retrieve Parental Consent Status
After reading the news below, we are currently working on updating our app in preparation for the enforcement of Texas SB 2420. https://developer.apple.com/news/?id=2ezb6jhj Based on the information in the announcement, we understand that parents will be able to revoke their consent for apps. However, we are unsure how an app is supposed to obtain or verify the parent’s consent status in the first place. We reviewed the Declared Age Range API and PermissionKit’s Significant Change API, but could not find any functionality related to this. If anyone with expertise on this topic has insight, we would greatly appreciate your guidance. Thank you in advance.
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22h
Phonetic vs Pronunciation contacts fields and Siri
The contacts app has fields for Phonetic and Pronunciation. My app adds phonetic data to the phonetic field to help Siri better understand contacts stored in Greek, Cyrillic, or Georgian. However, using the phonetic field causes the sorting order of contacts to be messed up. For example, Greek B (beta) is represented as a phonetic sound of V, resulting in a completely incorrect sorting order. The pronunciation field doesn’t seem to affect the sorting order, but I’m not sure what it does or should do. My questions are: Do we understand the difference between phonetic and pronunciation, and how Siri actively uses them? If the phonetic field is the correct one to use, how can we raise a feature request with Apple to add an option to sort contacts based on phonetic fields or not? Here’s a test you can try: Create a new contact with the following details: First name: test Last name: test Phonetic first name: Billy Phonetic last name: Idol Ask Siri to show the contact Billy Idol. It will return the “test test” contact. Switch from the phonetic to the pronunciation fields. Now, Siri won’t find Billy Idol.
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131
May ’25
App Clip invocation fails with "ASDErrorDomain error 507" via Smart App Banner especially on iOS 26 devices.
Hello, We are encountering an issue where invoking our App Clip via a Safari Smart App Banner fails on certain devices, particularly those running iOS 26. When a user taps "Open" on the Smart App Banner, the App Clip card attempts to load but ultimately fails with ASDErrorDomain Error 507. The error occurs consistently on specific devices, while other devices function correctly. In some instances, the App Clip card metadata/UI appears momentarily (flashes on the screen) before the error message is displayed and the process terminates. Has anyone else experienced this specific ASDErrorDomain error? We have already submitted a report via Feedback Assistant, but any insights or workarounds from the community would be appreciated. Thanks!
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WeatherKit JWT Auth error for SOME customer devices
We have a subscription WeatherKit app which has been on the App Store since December 2023. I am getting intermittent JWT auth failures on customer devices. In the great majority of cases, the request succeeds, but sometimes it fails, and sometimes it fails and never recovers. I’m working with a customer right now who is unable to get any weather data at all, and the logs he sends me show WeatherDaemon.WDSJWTAuthenticatorServiceListener.Errors error 2 The app uses the WeatherKit SDK (we are not using the REST API directly). We know we have the project setup as it has been working since launch, and I can verify weatherkit using security cms -D -i embedded.mobileprovision It it not a problem with the specific query, since I can get data for the dates and locations they are requesting. I can’t replicate the problem on my test devices. In case there is a rate limit issue: this app is a bit unusual and downloads an unusual amount of data at once using multiple queries in parallel using a TaskGroup. When the user creates a location, the app downloads a 10 day block of weather (7 days in the past + 3 day forecast) using WeatherService.shared.weather( for: location, including: WeatherQuery.daily( startDate: startDate, endDate: endDate ), WeatherQuery.hourly( startDate: startDate, endDate: endDate ) ) It also downloads about 2 months of daily precipitation data using multiple parallel calls to dailySummary in 10 day blocks: WeatherService.shared.dailySummary( for: location, forDaysIn: DateInterval(start: startDate, end: endDate), including: .precipitation ) In almost every case, including on my test devices, this works. But some users get WeatherDaemon.WDSJWTAuthenticatorServiceListener.Errors error 2 on every request. The two users yesterday that had this problem were both on iOS 18.5 for what that's worth, though the app supports 17.2+ Is anyone else seeing this? And can anyone suggest anything else to explore? It's obviously a terrible experience for customers who pay for the service and are unable to get any data. I did submit this info to Apple as FB18276275
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Jun ’25
FamilyActivityPicker Crash on selecting some items
Both view and modifier versions of the FamilyActivityPicker crash randomly when selecting some items (usually the other option) throwing these in the console: [com.apple.FamilyControls.ActivityPickerExtension(1150.1)] Connection to plugin invalidated while in use AX Lookup problem - errorCode:1100 error:Permission denied portName:'com.apple.iphone.axserver' PID:22091 ( 0 AXRuntime 0x00000001c603b0fc _AXGetPortFromCache + 800 1 AXRuntime 0x00000001c603cce0 AXUIElementPerformFencedActionWithValue + 700 2 UIKit 0x0000000230de3ec8 DDE6E0C5-2AC3-3C73-8CFE-BC88DE35BB5F + 1453768 3 libdispatch.dylib 0x0000000103ef0b98 _dispatch_call_block_and_release + 32 4 libdispatch.dylib 0x0000000103ef27bc _dispatch_client_callout + 20 5 libdispatch.dylib 0x0000000103efa66c _dispatch_lane_serial_drain + 832 6 libdispatch.dylib 0x0000000103efb408 _dispatch_lane_invoke + 408 7 libdispatch.dylib 0x0000000103f08404 _dispatch_root_queue_drain_deferred_wlh + 328 8 libdispatch.dylib 0x0000000103f07a38 _dispatch_workloop_worker_thread + 444 9 libsystem_pthread.dylib 0x00000001f0824f20 _pthread_wqthread + 288 10 libsystem_pthread.dylib 0x00000001f0824fc0 start_wqthread + 8 ) This also happens in production apps like the Opal. The questions are: At least how to detect it to be able to manually reload the sheet (like what Opal does and shows an alert when this happens) How to prevent it in the first place? I really appreciate any help you can provide.
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1.6k
Aug ’25
Interactive Widget: unable to reload timeline from AppIntent
My app features two kinds of widgets, let's call them kind A and kind B. I have both A and B widgets on my Home Screen. When I tap the button on widget A (associated with App Intent), I expect widget B to also reload. However, if you call WidgetCenter.shared.reloadAllTimelines() inside the perform() method of the AppIntent, the timeline of widget B does not reload immediately. This issue only occurs on a physical device and is not consistently reproducible. On a simulator, however, widget B reloads as expected. FB13152293
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1.2k
Feb ’25
WeatherKit failing on JWT Error
My app AirCompare has been in the app store and successfully using WeatherKit to fetch weather since it became available. Now some (not all) users are encountering the following errors: Failed to generate jwt token for: com.apple.weatherkit.authservice with error: Error Domain=WeatherDaemon.WDSJWTAuthenticatorServiceListener.Errors Code=2 "(null)" Encountered an error when fetching weather data subset; location=<+42.40865786,-88.96911526> +/- 0.00m (speed -1.00 mps / course -1.00) @ 6/23/25, 2:56:47 PM Central Daylight Time, error=WeatherDaemon.WDSJWTAuthenticatorServiceListener.Errors 2 Error Domain=WeatherDaemon.WDSJWTAuthenticatorServiceListener.Errors Code=2 "(null)" Others are reporting this same problem here in the forums. We need a solution!
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Jun ’25
macOS 26 beta: No Fast User Switching?
I have installed the macOS 26 WWDC beta on a secondary volume, and set it up with two user accounts (both administrators). However, the options for switching users without fully logging out are nowhere to be found. The topic is still included in macOS Help and is shown when searching for “fast” in System Settings, however, the option is hidden/missing in the pref pane when selected. Filed FB18155517 (macOS 26 beta: No Fast User Switching?)
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Jun ’25
Universal link not working
My ASA file is located here https://staging.docyt.com/apple-appsite-association It downloads fine. It does not have .json extension and neither does it reside inside the ./well-known folder. Should it work? Because opening the link https://staging.docyt.com/reset-password is not opening the app installed via TestFlight . Installing via XCode however works fine. Please help
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859
Apr ’25
ShieldConfigurationExtension not working
I created a ShieldConfigurationExtension in Xcode 14.3 with File > New > Target > ShieldConfigurationExtension. This created the extension with all the necessary Info.plist values (correct NSExtensionPrincipalClass, etc.), with the extension included in embedded content in the host app target. No matter what I try, the extension is not getting invoked when I shield applications from my host app. The custom UI does not show as the shield, and looking at the debugger, an extension process is never invoked. I am shielding categories like this: let managedSettings = ManagedSettingsStore() ... managedSettings.shield.applicationCategories = .all() And my extension code overrides all the ShieldConfigurationDataSource functions. class ShieldConfigurationExtension: ShieldConfigurationDataSource { override func configuration(shielding application: Application) -> ShieldConfiguration { return ShieldConfiguration( backgroundBlurStyle: UIBlurEffect.Style.systemThickMaterial, backgroundColor: UIColor.white, icon: UIImage(systemName: "stopwatch"), title: ShieldConfiguration.Label(text: "You are in a Present Session", color: .yellow) ) } override func configuration(shielding application: Application, in category: ActivityCategory) -> ShieldConfiguration { return ShieldConfiguration( backgroundBlurStyle: UIBlurEffect.Style.systemThickMaterial, backgroundColor: UIColor.white, icon: UIImage(systemName: "stopwatch"), title: ShieldConfiguration.Label(text: "You are in a Present Session", color: .yellow) ) } override func configuration(shielding webDomain: WebDomain) -> ShieldConfiguration { return ShieldConfiguration( backgroundBlurStyle: UIBlurEffect.Style.systemThickMaterial, backgroundColor: UIColor.white, icon: UIImage(systemName: "stopwatch"), title: ShieldConfiguration.Label(text: "You are in a Present Session", color: .yellow) ) } override func configuration(shielding webDomain: WebDomain, in category: ActivityCategory) -> ShieldConfiguration { return ShieldConfiguration( backgroundBlurStyle: UIBlurEffect.Style.systemThickMaterial, backgroundColor: UIColor.white, icon: UIImage(systemName: "stopwatch"), title: ShieldConfiguration.Label(text: "You are in a Present Session", color: .yellow) ) } } What am I missing?
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2.6k
Jun ’25
Critical Technical Issue: App Update Rendering iPhones Inoperative on iOS 16 Versions
We appreciate your suggestion to use the Apple Developer Forums. However, we must respectfully request further escalation of this issue beyond the forums for several critical reasons: Severity and Scope: This is not a general development discussion topic. We are facing a massive, reproducible performance issue on iOS 16 that renders devices unresponsive, requiring factory resets or DFU restores. This goes far beyond typical app bugs and points to a potential systemic issue in the OS's image handling. Insufficiency of Forum Support: While the forums are a valuable resource for community advice, they cannot provide the official, in-depth technical diagnosis from Apple engineers that this situation demands. Our users' devices are being bricked by an app update that passed App Review, and we require clarity on the root cause to prevent further damage and restore user trust. Code-Level Support Eligibility: As members of the Apple Developer Program, we believe our issue falls under the purview of Code-Level Support, as described on the Apple Developer website 9. Our problem involves "building or running software" and requires expertise in Apple's frameworks and hardware-level image rendering APIs. We request that our case be forwarded to that specialized team. To reiterate the core problem: Our update introduced 1024x1026 JPEG assets into the Asset Catalog. On iOS 16, this causes severe overheating, freezing, and device unresponsiveness. Replacing them with PNGs completely resolves the issue. This suggests a potentially serious regression in iOS 16's JPEG decoding or memory management pipeline. We prepared to provide a sample project that demonstrates the issue if required. Our case number is 102678393572. We urgently need to understand why this happens at the OS level to ensure our app is safe and to contribute to the stability of the iOS platform. Please escalate this case to the appropriate technical team for a detailed investigation. Sincerely,
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Oct ’25
iOS fails to fetch AASA file for IDNs
Subject: iOS Fails to Fetch AASA File for Internationalized Domain Names (IDN) in Unicode or Punycode Format Dear Apple Developer Relations Team And Community Members, We are reporting a critical bug in the iOS Associated Domains feature that prevents Universal Links from working for apps using Internationalized Domain Names (IDN). Problem Description: The iOS operating system does not attempt to download the apple-app-site-association (AASA) file for domains containing non-ASCII characters (e.g., diacritics, Cyrillic). This failure occurs regardless of whether the domain is specified in the app's entitlements in its human-readable Unicode format (e.g., montréal.ca) or its encoded Punycode format (e.g., xn--montral-fya.ca, xn--e1afka0abm4b.xn--p1ai). Without fetching and validating this file, Universal Links are not activated, and the system fails to establish a connection between the website and our app. Steps to Reproduce: Create an app with the Associated Domains entitlement enabled. Add an IDN to the entitlement. We tested both formats: Format A (Unicode): applinks://montréal.ca Format B (Punycode): applinks://xn--montral-fya.ca Host a valid AASA file on our server at the correct, accessible well-known URLs for both domain representations: For montréal.ca: https://montréal.ca/.well-known/apple-app-site-association and https://xn--montral-fya.ca/.well-known/apple-app-site-association Install the app on a device running the latest iOS version. Monitor network traffic using a tool like Charles Proxy. Observed Result: No HTTP GET request is made to any of the AASA URLs for the domains montréal.ca (in either Unicode or Punycode format) upon app installation. The system does not initiate the domain validation process. In contrast, for a standard ASCII domain (e.g., applinks://example.com), the AASA fetch is triggered immediately and is observed in the network log. Expected Result: iOS should correctly resolve the Internationalized Domain Name (whether specified in Unicode or Punycode format in the entitlement) and perform an HTTP GET request to fetch the AASA file from the /.well-known path, identical to its behavior for ASCII domains. Evidence & Configuration: Our server is configured correctly: SSL certificates are valid, the AASA file is served with the correct application/json MIME type, and is directly accessible via a browser or curl. The AASA file's syntax has been validated and is correct. The issue is reproducible on the latest versions of iOS. Impact: This bug blocks a core platform feature for millions of users in regions that use non-Latin scripts (e.g., France, Russia, China, Arab states). It makes it impossible to use Universal Links with our primary domains, severely degrading the user experience and forcing us to seek suboptimal workarounds like registering separate ASCII domains. Request: We kindly request that you investigate and log this issue as a bug in iOS and forward it to the appropriate engineering team for a fix in an upcoming update. We are prepared to provide any additional information, demo projects, or server access to assist in diagnostics. Thank you for your attention to this serious matter.
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Apple Watch CMMotionManager acceleration direction
I'm working with the Apple Watch's acceleration data and have referred to the document Identify the coordinate axes of the device. According to this document, the X-axis points to the right side of the watch, the Y-axis points towards the top side, and the Z-axis points towards the user. However, when I place the watch on a flat surface and move it horizontally to the right, I observe that the X-axis acceleration is negative. Similarly, when I move the watch vertically upwards, the Y-axis acceleration also shows a negative value. Is this expected behavior, or am I misunderstanding something about the coordinate system or acceleration readings?
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531
Jan ’25
Getting ShinyTV Example to Work
I have downloaded the ShinyTV example to test simplified sign-in on tvOS since it is not working in my own app, and I am having the same issue there. After assigning my team to the sample app, the bundle ID updates with my team id. I copy the bundle ID into a file entitled "apple-app-site-association" with this format: { "webcredentials": { "apps": [ "{MyTeamID}.com.example.apple-samplecode.ShinyTV{MyTeamID}" ] } } I upload the file to my personal site, ensuring that the content type is application/json. I adjust the Associated Domain entitlement to: webcredentials:*.{personal-site.com}?mode=developer using the alternate mode to force it to load from my site, not the CDN. When I run the build on tvOS, and click the Sign In button, it fails with these errors: Failed to start session: Error Domain=com.apple.CompanionServices.CPSErrorDomain Code=205 "Failed to prepare authorization requests" UserInfo={NSMultipleUnderlyingErrorsKey=( "Error Domain=com.apple.CompanionServices.CPSErrorDomain Code=205 \"Missing associated web credentials domains\" UserInfo={NSLocalizedDescription=Missing associated web credentials domains}" ), NSLocalizedDescription=Failed to prepare authorization requests} Session failed: Error Domain=com.apple.CompanionServices.CPSErrorDomain Code=205 "Failed to prepare authorization requests" UserInfo={NSMultipleUnderlyingErrorsKey=( "Error Domain=com.apple.CompanionServices.CPSErrorDomain Code=205 \"Missing associated web credentials domains\" UserInfo={NSLocalizedDescription=Missing associated web credentials domains}" ), NSLocalizedDescription=Failed to prepare authorization requests} ASAuthorizationController credential request failed with error: Error Domain=com.apple.AuthenticationServices.AuthorizationError Code=1004 "(null)" UserInfo={NSMultipleUnderlyingErrorsKey=( "Error Domain=com.apple.CompanionServices.CPSErrorDomain Code=205 \"(null)\"" )} Failed with error: Error Domain=com.apple.AuthenticationServices.AuthorizationError Code=1004 "Failed to prepare authorization requests" UserInfo={NSMultipleUnderlyingErrorsKey=( "Error Domain=com.apple.CompanionServices.CPSErrorDomain Code=205 \"Missing associated web credentials domains\" UserInfo={NSLocalizedDescription=Missing associated web credentials domains}" ), NSLocalizedDescription=Failed to prepare authorization requests} What am I missing here?
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Jul ’25
Is it possible for a Live Caller ID server to specify different datasets?
In the documentation for the example Live Caller ID server (https://swiftpackageindex.com/apple/live-caller-id-lookup-example/main/documentation/pirservice/testinginstructions) there is an example service-config.json. file shown (without thorough documentation). That config file, and the whole of the instructions, center around there being two datasets of numbers: block and identity. My question is - is it possible for more than one dataset to be specified i.e. for block1 and block2 to be specified? The use case for this would be - suppose the Live Caller ID server has a set of numbers it has identified as being nuisance callers and so it lists these in the block section. However user A might want all these nuisance callers to be blocked but user B does not. Therefore the Live Caller ID extension on the handset would need to use a different dataset on the server so that user A's calls from a set of numbers is blocked, but user B's are not. Note that I'm not suggesting that the Caller ID server should be capable of storing individual user's preferences. All that would be required would be two data sets: one where blocked content is none and and one where blocked content is some. Then a user/app could switch between them as indicated by the user. Is that possible? If the database structure and service-config.json etc. is not configured to permit that, then could two different servers be set up to achieve this instead? i.e. so the server url specified in the app's extension can be set at run time and not at compile time?
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965
Mar ’25
ILMessageFilterSubAction symbol not found error on iOS 17.6
If I run an app with a Message Filter Extension on iOS 18 then it works as expected, however if its installed onto a phone with iOS 17.6.1 then there is the following error: dyld[1042]: Symbol not found: _$sSo40ILMessageFilterCapabilitiesQueryResponseC14IdentityLookupE21promotionalSubActionsSaySo0abI6ActionVGvs Referenced from: &lt;C82A1045-98F4-3751-8080-413FD0B0DEEB&gt; /private/var/containers/Bundle/Application/F295C156-9B20-4927-AEFA-C6983388B193/Myapp.app/PlugIns/MyMessageFilterExtension.appex/CequintTextFilterExtension.debug.dylib Expected in: &lt;29BFFA34-9B52-3D14-A254-A0653545B72E&gt; /System/Library/Frameworks/IdentityLookup.framework/IdentityLookup (App built using XCode 16.2). Here's code causing the issue: import IdentityLookup final class MessageFilterExtension: ILMessageFilterExtension {} extension MessageFilterExtension: ILMessageFilterQueryHandling, ILMessageFilterCapabilitiesQueryHandling { func handle(_ capabilitiesQueryRequest: ILMessageFilterCapabilitiesQueryRequest, context: ILMessageFilterExtensionContext, completion: @escaping (ILMessageFilterCapabilitiesQueryResponse) -&gt; Void) { let response = ILMessageFilterCapabilitiesQueryResponse() response.transactionalSubActions = [.transactionalCarrier, .transactionalHealth, .transactionalPublicServices, .transactionalFinance, .transactionalWeather, .transactionalRewards, .transactionalOrders, .transactionalOthers, .transactionalReminders] response.promotionalSubActions = [.promotionalOffers, .promotionalOthers, .promotionalCoupons] completion(response) } Message filter sub actions were introduced in iOS 16, so why is this error occurring when the code is run on iOS 17, but its fine with iOS 18? This isn't specific to my app, its easily reproducable in two minutes - create an app, add a message filter extension target, change the template code to add a transactional or promotional sub action and then run and it'll occur. (Reported as issue FB16148083)
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381
Jan ’25
Problem setting up AASA file (paths with queries)
In a project having both an app and a website, the following two website urls are to be handed over to the corresponding app: https://www.example.com/search?plus https://www.example.com/search?query=something In AASA file, this becomes: "components": [ { "/": "/search", "?": { "plus": "", "query": "?*" } } However, finally it does not work for both urls. Only the one with "query" works by hand over to app. For investigation, I have tried this for the problematic link: "components": [ { "/": "/search", "?": "plus" } and this works. How can I get both to work? (note that for the sake of brevity, only a portion of the AASA files are shown)
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174
May ’25