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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SensorKit - didFetchResult never get called.
We tried to fetch the recorded PPG data using SensorKit with the following code, however the didFetchResult callback method is never called. let ppgReader = SRSensorReader(sensor: .photoplethysmogram) let request = SRFetchRequest() let nowDate = Date() let toDate = nowDate.addingTimeInterval(-25 * 60 * 60) let fromDate = toDate.addingTimeInterval(-24 * 60 * 60) request.from = SRAbsoluteTime.fromCFAbsoluteTime(_cf: fromDate.timeIntervalSinceReferenceDate) request.to = SRAbsoluteTime.fromCFAbsoluteTime(_cf: toDate.timeIntervalSinceReferenceDate) ppgReader.delegate = self; ppgReader.fetch(request) The delegate called the didComplete successfully: func sensorReader(_ reader: SRSensorReader, didCompleteFetch fetchRequest: SRFetchRequest) But never called the didFetchResult func sensorReader(_ reader: SRSensorReader, fetching fetchRequest: SRFetchRequest, didFetchResult result: SRFetchResult<AnyObject>) -> Bool Any ideas why ? (I am wearing the watch for couple days and ensure it has the data for the time period I am querying) One thing I notice is when Apple granted us the entitlement, it uses Uppercase for ECG and PPG, however the document use Lowercases in the plist https://developer.apple.com/documentation/sensorkit/srsensor/photoplethysmogram Dose it matter ?
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138
Jan ’26
Forecasts missing in WeatherKit
I am using the WeatherKit REST API with hourlyStart/hourlyEnd parameters to request up to 240 hours of forecast data. However, when requesting later in the day, the API returns fewer than 240 hourly forecasts — e.g., 239 at 08:00, 238 at 09:00, etc. and goes up to 224 for 23:00 It appears the returned list is contiguous but truncated at the end compared to the full 240-hour window. I have also tried getting the data after sometime, like 09:00 data at 09:45 but still was missing the same data at the end. Is this expected WeatherKit behavior or a bug? If it’s expected, is there documentation explaining how the “forecast horizon” is determined and when it is updated? Thank you.
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173
Dec ’25
Clarification on AskCenter and Age Assurance APIs for Texas Regulatory Compliance
Hello, I’m currently reviewing and implementing age assurance and parental approval flows using AgeRangeService and PermissionKit (AskCenter) in the context of Texas regulatory compliance requirements. While the high-level APIs are clear, there are several technical aspects where the intended usage patterns are not fully explicit in the documentation. Clarification on these points would help ensure our implementation aligns with system expectations and regulatory obligations. ⸻ Querying the current approval state for SignificantAppUpdateTopic AskCenter.ask(...) returns Void, and AskCenter.responses(for:) provides an AsyncSequence of approval events. Is there an official or recommended way to determine whether a SignificantAppUpdateTopic has already been approved when the app launches, or is listening for future responses events the only supported mechanism? ⸻ Behavior of AskCenter.responses(for:) regarding past approvals When subscribing to AskCenter.responses(for:): • Does the stream replay previously recorded approval or decline decisions? • Or does it only emit events that occur after subscription? This affects whether the listener must be registered early in the app lifecycle. ⸻ Recommended lifecycle timing for registering a responses(for:) listener What is the intended or recommended time to register a responses(for:) listener? • At application launch • Immediately before calling ask(...) • When entering a specific gated feature Clarification on the expected lifecycle usage would be helpful. ⸻ Repeated calls to ask(...) after approval If AskCenter.ask(...) is called again for the same SignificantAppUpdateTopic after parental approval has already been granted: • Is the request ignored? • Is a new approval request sent to the parent? • Or is the call handled idempotently by the system? ⸻ Delivery of approval results when the child app is not running If a parent approves or declines a SignificantAppUpdateTopic while the child app is not running: • Will the approval decision be delivered as a responses(for:) event on the next app launch? • Or is the app expected to persist approval state locally? ⸻ Persistence of approval state Is the approval decision for SignificantAppUpdateTopic persisted by the system at the OS level, or is the app responsible for storing approval state? Additionally, does the approval persist across: • app restarts? • app deletion and reinstallation? ⸻ Meaning of activeParentalControls.significantAppChangeApprovalRequired How is activeParentalControls.significantAppChangeApprovalRequired determined? • Is this value explicitly configured by a parent (for example via Screen Time)? • Or is it automatically determined by the system based on region, age, or regulatory requirements? ⸻ Relationship between significantAppChangeApprovalRequired and AgeRangeService When activeParentalControls contains significantAppChangeApprovalRequired, is it still expected that apps call AgeRangeService.requestAgeRange(...)? Or can the presence of this flag be treated as sufficient indication that the user is a minor for gating purposes? ⸻ Recommended interpretation of AgeRangeDeclaration Is the intended usage of AgeRangeDeclaration to handle each case individually, or is it acceptable and recommended to interpret the values as different trust levels (for example, self-declared vs. government ID or payment verified)? Clarification on these points would help ensure that implementations of age assurance and parental approval flows are consistent with system behavior while meeting regulatory compliance requirements. Thank you for your guidance.
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79
Dec ’25
Universal links stopped working, CDN responds with 404 for our domain
From some moment of time, Universal Links stopped working for our app. As per my understanding, application reinstall or update caused system to fetch AASA file from CDN, which started to reply with 404 for our domain (https://app-site-association.cdn-apple.com/a/v1/app.link.digidentity.eu). In the meantime, nothing has changed inside our app or on our BE (https://app.link.digidentity.eu/.well-known/apple-app-site-association). Executing "curl -v https://app-site-association.cdn-apple.com/a/v1/app.link.digidentity.eu" returns following result * IPv6: (none) * IPv4: 17.253.15.197, 17.253.29.202, 17.253.37.203, 17.253.37.208, 17.253.57.197, 17.253.57.208, 17.253.29.196 * Trying 17.253.15.197:443... * Connected to app-site-association.cdn-apple.com (17.253.15.197) port 443 * ALPN: curl offers h2,http/1.1 * (304) (OUT), TLS handshake, Client hello (1): * CAfile: /etc/ssl/cert.pem * CApath: none * (304) (IN), TLS handshake, Server hello (2): * (304) (IN), TLS handshake, Unknown (8): * (304) (IN), TLS handshake, Certificate (11): * (304) (IN), TLS handshake, CERT verify (15): * (304) (IN), TLS handshake, Finished (20): * (304) (OUT), TLS handshake, Finished (20): * SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256 / [blank] / UNDEF * ALPN: server accepted http/1.1 * Server certificate: * subject: C=US; ST=California; O=Apple Inc.; CN=app-site-association.cdn-apple.com * start date: Jul 7 00:05:26 2025 GMT * expire date: Sep 30 19:08:48 2025 GMT * subjectAltName: host "app-site-association.cdn-apple.com" matched cert's "app-site-association.cdn-apple.com" * issuer: CN=Apple Public Server ECC CA 11 - G1; O=Apple Inc.; ST=California; C=US * SSL certificate verify ok. * using HTTP/1.x > GET /a/v1/app.link.digidentity.eu HTTP/1.1 > Host: app-site-association.cdn-apple.com > User-Agent: curl/8.7.1 > Accept: */* > * Request completely sent off < HTTP/1.1 404 Not Found < Apple-Failure-Details: {"cause":"dial tcp: lookup app.link.digidentity.eu on 10.100.53.53:53: dial tcp 10.100.53.53:53: connect: connection refused"} < Apple-Failure-Reason: SWCERR00302 Network error (temporary) < Apple-From: https://app.link.digidentity.eu/.well-known/apple-app-site-association < Apple-Try-Direct: true < Cache-Control: max-age=3600,public < Content-Length: 10 < Content-Type: text/plain; charset=utf-8 < Date: Thu, 21 Aug 2025 10:36:47 GMT < Vary: Accept-Encoding < Expires: Thu, 21 Aug 2025 10:36:57 GMT < Age: 2952 < Via: http/1.1 uklon5-vp-vst-011.ts.apple.com (acdn/1.16221), https/1.1 uklon5-vp-vfe-007.ts.apple.com (acdn/4.16219), http/1.1 defra1-edge-lx-005.ts.apple.com (acdn/260.16276), http/1.1 defra1-edge-bx-006.ts.apple.com (acdn/260.16276) < X-Cache: hit-fresh, hit-stale, hit-fresh, hit-fresh < CDNUUID: e06b4b03-f97d-48f8-97bb-774359a39fa2-4464142837 < Connection: keep-alive < Not Found * Connection #0 to host app-site-association.cdn-apple.com left intact On our end, we did not find any reason why it can be not available for Apple to fetch. Is SWCERR00302 an indication of problem on our end? Any help is appreciated
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179
Aug ’25
Share Age Range Permission - Defect 'Ask Always'
Share Age Range Permission is set to 'Ask First'. Application requested for AgeRange via requestAgeRange API. System presented a consent window where user has to make a choice. User did not acted. Application was pushed to background. Our Application supports PushToTalk Framework and we have successfully joined the channel already. User tapped on the blue-pill , SystemUI will get presented. User tapped on the SystemUI, A New Full Screen SystemUI will get presented. User chosen 'Leave' option and our application left the active channel. 10 User brought the application to foreground and the previous "Share Age Range" system window disappeared. 11. After Step 10, We need to terminate and launch our application in order to get the "Share Age Range" system window. Is "Share Age Range" system window getting disappear is expected here or a BUG
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95
Dec ’25
CSSearchableItemAttributeSet is missing recordingYear
I'd like to set the recordingYear in my Spotlight File Importer extension but the property is missing from CSSearchableItemAttributeSet e.g. in the resulting in mdls I'd like to see: kMDItemRecordingYear = 2008; This would allow me to search in Finder by the recording year criteria. There is a recordingDate property and I tried setting it to Date that only has a year but it didn't work. It just resulted in this: kMDItemRecordingDate = "2008-01-01 00:00:00 +0000";
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91
Mar ’25
Is testing of Age Range API available in xcode simulator?
From https://developer.apple.com/forums/thread/803945?answerId=862153022#862153022, the testing of Age Range API was not available through xcode simulator back in Oct 2025. Is this available now? In particular: Is requestAgeRange testing available through simulator? Is requestAgeRange testing with sandbox account available through simulator? Is isEligibleForAgeFeatures available through simulator? Is isEligibleForAgeFeatures testing with sandbox account available through simulator? If the answer is "yes" to any of the above, which version of the xcode and ios version should I use? So far I didn't get any of the above working on the simulator, and I can't find any documentation on the answers above. Thank you!
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187
Dec ’25
Texas age verification: revoked consent & notifications?
The published "Next steps for apps distributed in Texas" says "A parent or guardian in Texas can withdraw consent for any app, which will block launching of the app on the child or teen’s device." My question is: will this also block notifications sent to that app from showing up on that device? Or will notifications still be delivered to the notification center, even though the app can't be launched? (Specifically, notifications sent from a server via Firebase topic/token). If notifications are not blocked automatically, what is the expected flow for this scenario? My app sends notifications from a server like this. I could implement client-side code to say "if consent is revoked, unsubscribe from notifications", but if the OS blocks launching of the app, this client-side code would never run. Similarly, I could subscribe to the server notifications for when consent is revoked, but my app is free & accountless, so I'm not aware of any information in the server notification that I could use to identify the specific user whose notifications should be stopped. (For example my users won't have an appAccountToken because they never made a purchase). Guidance would be much appreciated. I'm trying to comply with the law but I don't know how.
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228
Nov ’25
How does ageGates actually affect the returned age range?
I’m trying to fully understand the purpose of the ageGates parameter in the AgeRangeService.requestAgeRange API. The official documentation includes the following statement: “The system may return geo-specific age ranges that override your provided age gates based on the person’s location and applicable regulations. When geo-specific ranges are required, the returned age range reflects regulatory requirements rather than the bounds of your age gates.” Based on this, it seems that even if my app provides specific age thresholds through the ageGates parameter, the system may override those boundaries depending on regional laws or regulations, and return a completely different lowerBound / upperBound than what my age gates would suggest. My current understanding is: ageGates indicates the thresholds my app uses to define its internal feature tiers, but the actual age range returned by the OS is determined by legal or regional requirements (e.g., COPPA, GDPR-K, AADC, SB2420), meaning the returned age range may not align with the age ranges implied by my ageGates values. I’d like to confirm whether this interpretation is correct. Additionally, if different regions may produce different lowerBound / upperBound values due to regulatory requirements, then it seems that: developers shouldn’t rely on fixed age buckets, and instead must implement feature gating logic dynamically based on whatever age range the OS returns. So my questions are: Is my understanding correct that ageGates is simply a hint that describes my app’s tier thresholds, and the OS may override those boundaries to comply with local regulations? If lowerBound / upperBound can vary across regions, what is the recommended way for developers to design their feature-gating logic? Should we avoid hardcoded age buckets and instead build flexible logic that adapts to whatever range the OS returns? I’d appreciate clarification so I can design our age-based policies appropriately and in a regulation-compliant way.
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101
Dec ’25
Apps remain blocked after being unselected
Hi everyone, We're using the react-native-device-activity package to implement app blocking via Apple's Screen Time API. The blocking functionality works well: when the user selects apps and taps "Done," those apps get blocked as expected. However, we're facing an issue with unblocking apps that the user later unselects. Even after the user unchecks some apps and taps "Done" again, those previously selected (now unselected) apps remain blocked and still show the shield.
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117
May ’25
Action Extensions: How do Amazon & Google open their apps?
Both follow the same pattern: show the image that is being shared along with a CTA button about doing something with it in their app. When you tap the button, their app opens. Is there some kind of magic conditions that tapping the button creates that makes extensionContext.open(_ URL: URL, completionHandler: ((Bool) -> Void)?) accept a URL for opening the app? Or are they just using the "walk the responder chain" hack and using the user's intent to do something in their app as sufficient justification for using it? I've tried opening a registered URL scheme for my app synchronously with the button tap, but it still is refusing to open (callback returns false).
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56
Nov ’25
Associated domain not recognised
I have a public and accessible .well-known/apple-app-site-association file for both my domain.com and subdomain.domain.com with "paths": ["*"] . Both example.com and blog.example.com are added in Associated domains and any link that contains domain.com and domain.com/path normally deep links into my app. I used to have an *.example.com that successfully deep linked all my subdomains into my app but now I had to remove it as some subdomains will need to link to other apps, but some should still link to the same app. I removed * but left blog.example.com as that specific subdomain still needs to deep link into my app. But now blog.example.com is not even being recognized by my app and any link starting with blog.example.com just opens in safari. What am I missing? Why is this happening ?
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118
Aug ’25
Alarm Kit - Sound Repetition
Hello, If I fire an alarm using AlarmKit, using a ringtone that lengths less than 30 seconds, in the last version of iOS (26.0) the sound doesn't repeat. (After about 30 seconds, the sounds stops). BUT in the current version of iOS (26.1), the sound repeats until we slide Stop, thing that I doesn't want. So, is there a way to restore the previous behavior? Or is there a property that can fill this lack? Thank you very much.
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240
Nov ’25
Device Activity Monitor Schedules Disappear
Hey everyone, I have an app using the screen time api, I've had quite a few reports from users saying that our monitoring features stop working until they open our app. What happens is that activities and schedules set with the device activity monitor seem to disappear. This is something we check on app re-opens and so we schedule them again and that is why the monitoring starts working again. Of course our current solution is not optimal since our app is mainly passive. Has anyone experienced these kinds of issue ?
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201
Mar ’25
Presumably its not possible to use declared age range in an extension?
Its possible to add the Declared Age Range entitlement to extensions, in particular I'm looking at a Notification Service Extension. However the DAR requestAgeRange() API takes a view controller as a parameter. Presumably therefore its not possible for a notification service extension to obtain the age range itself directly? Yes the extension can read it from shared groups if the app reads it and set it into the group. However the scenario I'm thinking of is this: App runs and gets the age range. Sets its functionality accordingly. The server sends pushes which are intercepted by the notification service extension, the extension adjusts its functionality based upon what the app wrote to shared groups The user changes the age range setting, but the app doesn't run. The extension keeps receiving pushes but its functionality is now out of sync with the age range as its not able to obtain it directly
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93
Oct ’25
Message Filter Extension Impacts
Hello, We are using a Message Filter Extension (ILMessageFilterExtension) to classify SMS/iMessage content (junk vs allow) in our app. After testing on iOS 26.1, we want to confirm whether there are any behavioral, performance, or API-level changes that impact message filtering, such as: Changes in how often the filter extension is invoked Differences in classification accuracy or system overrides New privacy, entitlement, or permission-related restrictions Execution time limits or memory constraints Any changes specific to iMessage vs SMS filtering We did not find any explicit mention of Message Filter Extensions in the iOS 26.1 release notes and would like to confirm whether the existing behavior from previous iOS versions remains unchanged. Has Apple introduced any known or undocumented changes in iOS 26.1 that developers should be aware of when supporting Message Filter Extensions? Sometime I also found unpredictable behaviour on iOS version 18.5 or below, like sometime it works but sometimes starts working. Thanks in advance for any guidance.
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197
Jan ’26
Can I hide the NFC App Clip card?
Dear Apple Engineers: My app utilizes the App Clip experience. I would like to prevent the App Clip card from appearing when the host app is running in the foreground. How can this be achieved? I have observed that Alipay (in China) does not display an App Clip card when the device is tapped against a tag while the app is in the foreground, which indicates that this behavior is possible. Thank you for your assistance.
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69
Jan ’26
Delays When Creating Advanced App Clip Experiences for Other Businesses
Hey there, I have an app where I create custom Advanced App Clip Experiences for other businesses which seems to be a valid thing. I do create them via API. Upon creation everything looks fine: when I go to App Store Connect -> App -> Advanced App Clip Experiences, I do see the new App Clip Experience I've just created. Their status is Received (as any other active experiences) and have a custom URL. The issue is weird timing when the Advanced App Clip Experience actually becomes available on the iPhone (can be triggered via App Clip Code, etc). Some experiences become available literally immediately but others take days (some take 1-2 days, some take ~5 days). I'm not sure why there's a bid difference for an Advanced App Clip to be actually active. Does anyone have any kind of experience with that? I don't change domain settings, app's settings, etc. I'm just creating a new experience (both via API or manually at App Store Connect) and I do have different "activation" times for different App Clips. Same when I delete an Advanced App Clip Experience, it will still be available for next couple days. I get there might be caching stuff, etc. But the difference is quite huge and makes no sense since as I've mentioned some clips become available immediately but some takes days to be available. Thank you!
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101
Jun ’25