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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How to open main app from ShieldActionExtension?
Hi! I'm building a Screen Time management app using FamilyControls and ManagedSettings. When a user taps the primary button on a ShieldActionExtension, I need to open my main app to guide them through an intervention exercise. Other approved App Store apps like Jomo - Screen Time Blocker do exactly this: tapping their shield's primary button opens the main Jomo app directly. Screen recording: https://drive.google.com/file/d/15yubtTdTkFskGCIaAw_HGB57-boHPl3a/view?usp=sharing I've tried: URL schemes (UIApplication.shared.open() unavailable in extensions) Universal links Local notifications (works, but adds an extra tap) NSUserActivity Is there a supported API I'm missing? Or another accepted solution? Any guidance is appreciated.
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4w
WeatherKit DayWeather::date Timezone Issue
I use WeatherKit with Swift to get multiple cities weather by longitude and latitude. But I use this API in WeatherService for daily forecast: final public func weather<T>(for location: CLLocation, including dataSet: WeatherQuery<T>) async throws -> T And I found there is something wired: The date of WeatherKit::DayWeather is based on my device's timezone settings. Tokyo's Day Weather is start at UTC+8, New York' Day Weather is start UTC+8. Is there any way to set timezone correctly?
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133
Apr ’25
Background Modes for Audio Playback
Summary: I'm developing an iOS audio app in Flutter that requires background audio playback for long-form content. Despite having a paid Apple Developer Program account, the "Background Modes" capability does not appear as an option when creating or editing App IDs in the Developer Portal, preventing me from enabling the required com.apple.developer.background-modes entitlement. Technical Details: In the app that I am developing, users expect uninterrupted playback when app is backgrounded or device is locked similar to Audible, Spotify, or other audio apps that continue playing in background The Problem: When building for device testing or App Store submission, Xcode shows: Provisioning profile "iOS Team Provisioning Profile: com.xxxxx-vxxx" doesn't include the com.apple.developer.background-modes entitlement. However, the "Background Modes" capability is completely missing from the Developer Portal when creating or editing any App ID. I cannot enable it because the option simply doesn't exist in the capabilities list. What I've Tried: Multiple browsers/devices: Safari, Chrome, Firefox, incognito mode, different computers Account verification: Confirmed paid Individual Developer Program membership is active New App IDs: Created multiple new App IDs - capability never appears for any of them Documentation review: Followed all Apple documentation for configuring background execution modes Different regions: Tried changing portal language to English (US) Cache clearing: Logged out, cleared cookies, tried different sessions Apple Support Response: Contacted Developer Support (Case #102633509713). Received generic documentation links and was directed to Developer Forums rather than technical escalation. Has anyone else experienced the "Background Modes" capability missing from their Developer Portal? Has anyone successfully used the App Store Connect API to add background-modes when the GUI doesn't show it? What's the proper escalation path when Developer Support provides generic responses instead of technical assistance? Things I have attempted to solve this: audio_service package: Implemented as potential workaround, but still requires the system-level entitlement Manual provisioning profiles: Cannot create profiles with required entitlement if capability isn't enabled on App ID Other perhaps important facts about the environment where I am building the app: macOS Sonoma Xcode 15.x Flutter 3.5.4+ Apple Developer Program (Individual, paid)
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123
Jul ’25
AlarmKit can we automatically acknowledge the alarm or set a time period the alarm should alert for
My use case is a Repeat Timer app. The user can configure a repeating timer, say: 8 minutes with 3 sets So I would like to configure either 3 alarms (8mins, 16mins, 24mins) or a repeating alarm (8mins every 3 mins) BUT... I would like the first and second alarms to break through but only for 5 seconds for example, and then stop (so the user doesn't need to tap the screen to silence the alarm). I don't think this is possible after reading the API docs, but am asking the question anyway. Thanks for any advice or guidance here, and happy WWDC!
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Jun ’25
SCREEN TIME API is reporting false positives to DeviceActivityMonitor extension in iOS 26.2 & 26.3
Since the iOS 26.2 update, we have been experiencing anomalous behavior with the DeviceActivityMonitor extension when utilizing the ScreenTime API. Specifically, we are receiving the eventDidReachThreshold event within a few minutes of initiating monitoring, despite configuring a high usage limit. The process of turning off Screen Time -> restarting the device -> turning on Screen Time does not work. Any ideas? Thanks Filed Feedback Assistant: FB21560904
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317
Jan ’26
iOS magnetometer data processing
Hello, I’m developing an app to detect movement past a strong magnet, targeting both Android and iOS. On Android, I’m using the Sensor API, which provides calibrated readings with temperature compensation, factory (or online) soft-iron calibration, and online hard-iron calibration. The equivalent on iOS appears to be the CMCalibratedMagneticField data from the CoreMotion framework. However, I’m encountering an issue with the iOS implementation. The magnetometer data on iOS behaves erratically compared to Android. While Android produces perfectly symmetric peaks, iOS shows visual peaks that report double the magnetic field strength. Additionally, there’s a "pendulum" effect: the field strength rises, drops rapidly, rises again to form a "double peak" structure, and takes a while to return to the local Earth magnetic field average. The peaks on iOS are also asymmetric. I’m wondering if this could be due to sensor fusion algorithms applied by iOS, which might affect the CMCalibratedMagneticField data. Are there other potential reasons for this behavior? Any insights or suggestions would be greatly appreciated. Thank you!
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102
Jun ’25
DeviceCheck framework error
We integrated DeviceCheck framework into our app to prevent fraudulent call to our app service around one year ago. Recently, we received a few cases related to this function over Christmas Eve period. Based on the logs we have, it indicated both the following two functions returned errors. But we don't have the exactly errors logged and now we cannot replicate. DCAppAttestService.shared.attestKey() DCAppAttestService.shared.generateAssertion() The other finding we have is some users reporting this issue recently upgraded their devices from iOS 18 to iOS 26. So we are suspecting it's due to either the OS upgrading, or Apple's app attest service degrading. Anyone encountered the similar issues before, or have any idea regarding the root cause? Thanks!
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Dec ’25
How is Security Delay still so broken?
I'm sitting at my house and trying to sign my test device out of my apple ID so I can sign into a Sandbox user, but now I have an hour to kill because of this terribly broken "security" feature that thinks it's in an unfamiliar location, despite being at the only location it's ever known. Looks like I'll just be disabling this feature all together. Especially as a device with Developer Mode enabled, which gets reset regularly, there should be additional options here. Come on!
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Apr ’25
CNContact poster
Hi all, From what I’ve seen on forums and other sources, it appears that nothing can be done to set the contact poster programmatically. Setting the imageData property affects only the thumbnail image. Does anyone know if this is explicitly documented somewhere? I need this information for a POC document. I watched the iOS 17 keynote (where it was introduced), the Platform State of Union, and other WWDC videos, but I couldn’t find any mention of it. The Contacts framework documentation only explains what can be retrieved from this property and doesn’t mention any way to set the contact poster. If anyone has any information on this, please help! Thanks in advance!
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86
Mar ’25
Clarification of Age Assurance Implementation (Guideline 2.3.6)
My app updates are repeatedly rejected under Guideline 2.3.6 – Accurate Metadata, with a request to remove “Age Assurance” unless the feature can be located. However, the app does include age assurance. During onboarding, users must enter their date of birth, and users under 16 are blocked from completing registration and using the app. The app contains a women’s health blog and a community Q&A feature (similar to Reddit), where users can ask and answer health-related questions. For this reason, I am considering restricting access to users 18 and older. Each time I explain this to the review team and provide a screenshot of the DOB screen, the app is approved. What is the correct way to document or surface this in App Store Connect so reviewers can easily find it and avoid repeated rejections? Is a DOB gate sufficient for Apple’s definition of Age Assurance?
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Dec ’25
WeatherKit attribution for watch app
I have a watch only app that display an open/close park status and the current temperature with a current condition icon. That's it. On second submission the watch app was rejected due to no WeatherKit attribution. I have a lack of clarity of what's needed. With my single view that display my content I don't want WeatherKit attribution to overwhelm what's being presented to the user. I've tried looking for watch apps in the store that provide attribution and I'm not finding any. Looking for advice on how to meet this requirement without attribution overpowering my content.
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Dec ’25
Contacts Framework CPU Loop (M1 Max / Exchange)
When syncing an Office 365 (Exchange) account on an M1 Max machine running the latest macOS (e.g., Sonoma), the native contactsd and AddressBookManager processes enter a severe, persistent failure loop. The CPU usage spikes from 0.0% to over 80% (observed at 81%) and repeats every 60-90 seconds. This occurs even when the account is entirely empty of contacts and after performing a clean macOS installation, strongly indicating a systemic bug in the framework's Exchange protocol handler on the M1 architecture. System Information Affected Hardware: Apple M1 Max Affected macOS Version: Tahoe 26.1 Affected Processes: contactsd, AddressBookManager Account Type: Microsoft Exchange / Office 365 Steps to Reproduce System Setup: Perform a clean installation of macOS on the M1 Max machine (USB boot, NO Migration Assistant or data restoration). Account Preparation: Ensure the target Exchange account's contacts folder is entirely empty on the server (via Outlook Web Access). Trigger: Go to System Settings > Internet Accounts and add the Exchange account. Ensure ONLY Contacts is toggled ON. Observation: Open Activity Monitor and sort by % CPU. Expected Behavior The contactsd and AddressBookManager processes should spike briefly (under 5%) to establish the empty sync, then settle to a persistent idle state (0.0% to 0.5% CPU). Actual Behavior The processes never settle: CPU Spikes: Usage repeatedly jumps from 0.0% to 81% for AddressBookManager and 22-59% for contactsd. Pattern: This extreme spike lasts for a few seconds before the thread crashes/restarts, and the process immediately re-initiates the loop, consuming massive CPU cycles continuously. Diagnostic Proof The runaway CPU is not caused by corrupt data: Data Neutralization: The account's contacts folder was emptied on the server, yet the high CPU loop persisted when syncing. Clean System: The issue is reproducible on a clean, from-scratch macOS installation, ruling out corrupted user preferences or system files. Cross-Architecture: The exact same account syncs perfectly on iOS and newer M4 Macs, confirming the data is valid and the issue is specific to the M1 Max's implementation of the Exchange protocol handler. Workaround (For Visibility) To restore system performance, the user must DELETE the entire Exchange account from System Settings > Internet Accounts and use a third-party client (e.g., Outlook for Mac) for synchronization, as it bypasses the buggy native framework.
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Dec ’25
App clip card is still there
Hi everyone, I’ve removed my App Clip completely: Deleted all Advanced App Clip Experiences Removed the App Clip target from my build Removed App Clip references from my apple-app-site-association file Deleted the meta tag from my website: But when I scan the QR code, the App Clip card still appears with: "This App Clip is not currently available in your country or region." Does anyone know why this is still showing and how to fully remove it? we need to show our website when this QRCode is scanned. Thanks!
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50
Dec ’25
Testing TelephonyMessagingKit Outside of The EU
Is it possible to develop for TelephonyMessagingKit on iOS 26 outside of the EU? If so, how is this accomplished? I have added the 'Default Carrier Messaging App' entitlement to my project, but I do not see an option to set my app as a default option in settings on my device. I am not located inside of the EU, but would like to test this functionality.
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117
Dec ’25
Rosetta 2 - Build 1.0.0.0.1.1744447383
Goal: Manually install an explicit version of Rosetta2 Background: Me and some customers have an old app (intel) which perfectly worked with Rosetta2. In the last week of April most macheines were updated to Mac Os 15.4.1. and the app still starts but certain functionality is bronken. Some fields ind the forms don't write back to the database, some data can't be read from the database. (Most installations will fade out over the next month but it would be great to have the app fully working for data migration.) First try was to step back to 15.4. (Clean Install - Install App - Rosetta installs as expected): no change, app still broken Second try back to 15: (Clean Install - Install App - Rosetta installs as expected): App still broken (!) This is interesting as the app worked for month using Mac Os 15! Third try: Back to MacOS 14 (Clean Install - Install App - Rosetta installs as expected): App is working like nothing happend. (All attempts on same hardware of course.) Reasoning: Rosetta2 was the only software (besides the app itself) installed after clean MacOS installs. Now, my guess is that there were might be a change in Rosetta2 as the app worked on MacOs 15 up the update 15.4.1. was installed. Checking versions (pkgutil --pkg-info com.apple.pkg.RosettaUpdateAuto): Rosetta version MacOS 14: 1.0.0.0.1.1722778371 Rosetta version on MacOS 15.4.1: 1.0.0.0.1.1744447383 To fully verify the cause it would be great to uninstall Rosetta on MacOS15.4.1 machine and explicit install lower version (1.0.0.0.1.1722778371) which must be available somewhere as MacOS14 still gets this version. I know how to uninstall - is there a possibility to manually install an explicit version of Rosetta2?
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96
May ’25