Health & Fitness

RSS for tag

Explore the technical aspects of health and fitness features, including sensor data acquisition, health data processing, and integration with the HealthKit framework.

Health & Fitness Documentation

Posts under Health & Fitness subtopic

Post

Replies

Boosts

Views

Activity

Abnormal Background Delivery Frequency of HealthKit on Specific watchOS Devices
1/ Issue Summary In our application, we use HKObserverQuery together with:HKHealthStore.enableBackgroundDelivery(for:frequency: .immediate) to enable HealthKit Background Delivery, allowing the system to wake our App Extension in the background to process health data updates. Under the same app build, identical HealthKit permission configuration, and the same watchOS version, we have observed significant differences in background delivery frequency across different devices. Specifically, on certain devices (e.g. Apple Watch Series 10, watchOS 26.2.1), the background delivery frequency is significantly reduced, behaving as if it is capped at approximately once per hour. On other control devices, under the same configuration, background delivery is triggered much more frequently and consistently, at approximately every 8–16 minutes. This behavior is consistently reproducible on the affected devices. **We would like to understand whether there are any officially recommended implementation patterns, best practices, or device-/system-level considerations when using HKObserverQuery and Background Delivery, in order to achieve more consistent and predictable background update behavior across different devices running the same system version. ** 2/ Detailed Device Comparison We conducted internal comparison testing across multiple devices with the following results: Device A (Affected / Abnormal) Model: Apple Watch Series 10 (46mm) OS: watchOS 26.2.1 Serial (partial): C*HY Background Delivery Frequency: ~ once every 60 minutes (significantly lower than expected) Device B (Normal) Model: Apple Watch Series 10 (42mm) OS: watchOS 26.2.1 Serial (partial): G*4R Background Delivery Frequency: ~ every 8–16 minutes Device C (Normal) Model: Apple Watch Series 8 (41mm) OS: watchOS 26.3 Serial (partial): C*J6 Background Delivery Frequency: ~ every 8–16 minutes Device D (Normal) Model: Apple Watch Series 5 (41mm) OS: watchOS 10.6.1 Serial (partial): G*TQ Background Delivery Frequency: ~ every 8–16 minutes All devices share the following conditions: HealthKit permissions: Full read/write permissions granted Background App Refresh: Enabled System state: Low Power Mode, Do Not Disturb, and all Focus modes disabled App build: Identical app build installed on all devices HealthKit configuration: Same data types and same frequency parameter used in enableBackgroundDelivery Implementation: Identical HKObserverQuery implementation logic 3/ Abnormal Behavior Observed On the affected device(s), we observe that: HealthKit background delivery appears to be heavily coalesced or throttled The system rarely attempts to wake the App Extension Behavior is clearly inconsistent with other devices using the same configuration The behavior does not match our expectations for HealthKit Background Delivery with .immediate frequency 4/ Troubleshooting Already Performed We have already attempted the following on the affected device(s): Restarted both Apple Watch and paired iPhone Re-paired the Apple Watch Uninstalled and reinstalled the app Revoked and re-granted HealthKit permissions Confirmed that Low Power Mode, Do Not Disturb, and Focus modes are all disabled The issue remains consistently reproducible. 5/ Assistance Requested We would appreciate guidance on: Whether there are any officially recommended implementation patterns, tuning options, or best practices for using HKObserverQuery and HealthKit Background Delivery Whether there are any known device-level or system-level factors that may cause significantly different background delivery behavior on different devices running the same watchOS version How to best achieve consistent and predictable background update delivery behavior across devices for apps that rely on this mechanism 6/ Additional Information We can provide sysdiagnose logs from both affected and unaffected devices for comparison We can also provide a minimal reproducible sample project if needed
1
0
250
3w
Having trouble getting Apple Fitness move ring to be updated without Apple Watch
Some users have switched to wearing smart rings instead of an Apple Watch, but they still want their rings to close throughout the day in Apple Fitness to keep their streaks going. I've noticed that the 3rd party smart ring apps do not affect the progress of the exercise and move rings unless the user puts on their Apple Watch and syncs with there iPhone throughout the day. Is there a way to make the progress rings update throughout the day without having to connect an Apple Watch periodically?
1
0
59
4d
Health app fails to ingest FHIR Clinical Records on iOS 26.2 (healthappd crash) – Works on iOS 18.1
Area Health & Fitness → HealthKit → Health Records (FHIR Ingestion) Summary On devices running iOS 26.2, FHIR Clinical Records successfully connect and validate, but no data (Procedure, DiagnosticReport, Observation, etc.) is ingested into the Health app. The same FHIR server and patient connection works correctly on iOS 18.1, where all data syncs and displays as expected. On iOS 26.2: FHIR validation passes in Health Records “Last Download Date” updates Patient data is visible in connection No clinical data appears in Health app No apps are listed under Privacy → Health Device shows “No Data Found” Crash logs show healthappd terminating during ingestion This appears to be a regression in the HealthPlatform / HealthKit ingestion pipeline in iOS 26. Steps to Reproduce Use an iPhone running iOS 26.2 Open Health app Add Health Record from FHIR server Authenticate successfully Confirm FHIR validation screen shows all resources as “Passed” Wait for sync to complete Expected Result Procedures, DiagnosticReports, Observations, etc. should appear in Health app Data should be written to HealthKit Apps should appear under Settings → Privacy & Security → Health Actual Result No data appears in Health app No Procedures, DiagnosticReports, Observations, etc. Apps section under Health permissions shows “None” Device shows “No Data Found” Last Download Date updates correctly Validation Results (All Passed) The following FHIR resources show “Passed” in Health validation: AllergyIntolerance Condition DiagnosticReport DiagnosticReport-ClinicalNotes-Cardiology DiagnosticReport-ClinicalNotes-Pathology DiagnosticReport-ClinicalNotes-Radiology DocumentReference-ClinicalNotes Immunization MedicationRequest Observation-Labs Observation-VitalSigns Patient Procedure Server responses are correct and return expected data when tested via Postman. Crash Log Details Crash occurs in process: healthappd Frameworks involved: HealthPlatform.framework HealthKit Combine Exception: EXC_BAD_ACCESS SIGKILL EXC_ARM_PAC_FAIL Thread: com.apple.HealthKit.HKHealthStoreImplementation.client Stack trace includes: objc_msgSend HKSharedSummary DictionaryStorage.deinit swift_release_dealloc objc_destructInstance Publishers.MergeMany Future.init This indicates the ingestion pipeline crashes before data is written to HealthKit. Comparison Across OS Versions iOS Version Result iOS 18.1 Data syncs correctly iOS 26.2 No data syncs, healthappd crash Same: Same FHIR server Same patient Same authentication Same device model Same iCloud settings Additional Notes OAuth flow succeeds FHIR validation passes Server responses are correct Postman returns correct JSON No TLS errors No permission errors Issue only occurs on iOS 26+ This appears to be a regression in the FHIR ingestion engine introduced after iOS 18.1.
1
0
38
1d
Health app fails to ingest FHIR Clinical Records on iOS 26.2 (healthappd crash) – Works on iOS 18.1
Area Health & Fitness → HealthKit → Health Records (FHIR Ingestion) Summary On devices running iOS 26.2, FHIR Clinical Records successfully connect and validate, but no data (Procedure, DiagnosticReport, Observation, etc.) is ingested into the Health app. The same FHIR server and patient connection works correctly on iOS 18.1, where all data syncs and displays as expected. On iOS 26.2: FHIR validation passes in Health Records “Last Download Date” updates Patient data is visible in connection No clinical data appears in Health app No apps are listed under Privacy → Health Device shows “No Data Found” Crash logs show healthappd terminating during ingestion This appears to be a regression in the HealthPlatform / HealthKit ingestion pipeline in iOS 26. Steps to Reproduce Use an iPhone running iOS 26.2 Open Health app Add Health Record from FHIR server Authenticate successfully Confirm FHIR validation screen shows all resources as “Passed” Wait for sync to complete Expected Result Procedures, DiagnosticReports, Observations, etc. should appear in Health app Data should be written to HealthKit Apps should appear under Settings → Privacy & Security → Health Actual Result No data appears in Health app No Procedures, DiagnosticReports, Observations, etc. Apps section under Health permissions shows “None” Device shows “No Data Found” Last Download Date updates correctly Validation Results (All Passed) The following FHIR resources show “Passed” in Health validation: AllergyIntolerance Condition DiagnosticReport DiagnosticReport-ClinicalNotes-Cardiology DiagnosticReport-ClinicalNotes-Pathology DiagnosticReport-ClinicalNotes-Radiology DocumentReference-ClinicalNotes Immunization MedicationRequest Observation-Labs Observation-VitalSigns Patient Procedure Server responses are correct and return expected data when tested via Postman. Crash Log Details Crash occurs in process: healthappd Frameworks involved: HealthPlatform.framework HealthKit Combine Exception: EXC_BAD_ACCESS SIGKILL EXC_ARM_PAC_FAIL Thread: com.apple.HealthKit.HKHealthStoreImplementation.client Stack trace includes: objc_msgSend HKSharedSummary DictionaryStorage.deinit swift_release_dealloc objc_destructInstance Publishers.MergeMany Future.init This indicates the ingestion pipeline crashes before data is written to HealthKit. Comparison Across OS Versions iOS Version Result iOS 18.1 Data syncs correctly iOS 26.2 No data syncs, healthappd crash Same: Same FHIR server Same patient Same authentication Same device model Same iCloud settings Additional Notes OAuth flow succeeds FHIR validation passes Server responses are correct Postman returns correct JSON No TLS errors No permission errors Issue only occurs on iOS 26+ This appears to be a regression in the FHIR ingestion engine introduced after iOS 18.1.
1
0
38
1d
[WatchOS] Error while trying to insertRouteData into HKWorkoutRouteBuilder
I've ran into an error with the insertRouteData function of the HKWorkoutRouteBuilder that I can't seem to find any information on. The error is "Unable to find location series 1A193D3B-AFF5-41D8-A967-B1BE08D9F543 during data insert.". It seems to only happen when trying to insert very long routes, in the most recent case it was a 5 hour bike ride with 5900 samples. I save all the route data in a sqlite table as backup and after checking out the data there isn't any red flags as to why it would not insert correctly. Has anyone seen this before and could offer some insight or point me in the right direction to find the source of the error?
2
0
1.2k
Jan ’26
HKAnchoredObjectQuery updateHandler stops working with error
Hi! I am using the HKAnchoredObjectQuery to first get a snapshot of the initial results, and then trigger an updateHandler. I need to handle the initial results and the updates separately, which is why I implemented two completions. When I test the code, it works for a while. New and deleted samples trigger the updateHandler. However, after a while there appears an error: [connection] nw_read_request_report [C2] Receive failed with error "Software caused connection abort" Followingly, the updateHandler will stop getting triggered when I add updates in Apple health. Anyone have experience with this? func getMostRecentSample(for sampleType: HKSampleType, anchorKey: String, completion: @escaping (HKQuantitySample?, Error?) -> Swift.Void, updateHandler: @escaping (HKQuantitySample, Error?) -> Swift.Void) {     // If it is the first initialization, anchor is passed as nil     var anchor: HKQueryAnchor? = nil // Check for previous saved anchor in userdefaults     if UserDefaults.standard.object(forKey: anchorKey) != nil {       let data = UserDefaults.standard.object(forKey: anchorKey) as! Data       do {         guard let newAnchor = try NSKeyedUnarchiver.unarchivedObject(ofClass: HKQueryAnchor.self, from: data) else {           print("Could not parse anchor to HKQueryAnchor type")           return         }         anchor = newAnchor       } catch {         print("Error retreiving anchor from UserDefaults")       }     }     let query = HKAnchoredObjectQuery(type: sampleType,                      predicate: nil,                      anchor: anchor,                      limit: HKObjectQueryNoLimit                       ) { (query, samplesOrNil, _, newAnchor, errorOrNil) in       guard let samples = samplesOrNil as? [HKQuantitySample] else {         fatalError("*** An error occurred during the initial query: \(errorOrNil!.localizedDescription) ***")       }       if let anchor = newAnchor {         do {           let data = try NSKeyedArchiver.archivedData(withRootObject: anchor as Any, requiringSecureCoding: false)           UserDefaults.standard.set(data, forKey: anchorKey)         } catch {           print("Error retreiving anchor from UserDefaults")         }       }       completion(samples.last, nil)     }           // Setting up long-running query     query.updateHandler = { (query, samplesOrNil, _, newAnchor, errorOrNil) in       guard let samples = samplesOrNil as? [HKQuantitySample] else {         fatalError("*** An error occurred during an update: \(errorOrNil!.localizedDescription) ***")       }       if let anchor = newAnchor {         do {           let data = try NSKeyedArchiver.archivedData(withRootObject: anchor as Any, requiringSecureCoding: false)           UserDefaults.standard.set(data, forKey: anchorKey)         } catch {           print("Error retreiving anchor from UserDefaults")         }       }       if let sample = samples.last {         updateHandler(sample, nil)       }     }     self.healthStore.execute(query)   }
2
0
1.2k
Mar ’25
HKWorkoutSession.sendToRemoteWorkoutSession doesn't report success or failure
We are seeing an issue where sending data using the asynchronous method HKWorkoutSession.sendToRemoteWorkoutSession(data: Data) will never return in some cases (no success nor failure). This issue is happening for roughly 5% of Workouts started and will stay broken for the whole workout. The other 95% of the workouts, the connection works flawlessly. This happens on both watchOS 10 and 11, and with phones running iOS 17 or 18. The issue is quite random and not reproducible. Our app has thousands of workouts a day that use the workout session workout data send, with constant messages being send every few seconds. In some of those 5% cases the "sendToRemoteWorkoutSession" will throw way later, like 30+ minutes later, if the watch app is awake long enough to capture a log of a failure. Our code uses the same flow as in the sample project: https://developer.apple.com/documentation/healthkit/workouts_and_activity_rings/building_a_multidevice_workout_app Here is some sample code, which is pretty simple. Setup code: let workoutSession = try HKWorkoutSession(healthStore: healthStore, configuration: configuration) workoutSession.delegate = self activeWorkoutSession?.startMirroringToCompanionDevice { success, error in print("Mirroring started on companion device: \(success), error: \(error)") } workoutSession?.prepare() then later we send data using the workout session: do { print("Will send data") try await workoutSession.sendToRemoteWorkoutSession(data: data) print("Successfully sent data") // This nor the error may be called after waiting extensive amounts of time } catch { print("Failed to send data, error: \(error)") // This nor the success may be called after waiting extensive amounts of time } So far, the only fix is to restart the phone and watch at the same time, which is not a great user experience. Is anyone else seeing this issue? or know how to fix this issue?
2
0
870
Dec ’25
Location of indoor workouts
In the fitness app under iOS 18, the location of all workouts is displayed on a small map. For workouts with routes, I can already successfully read out the route and thus also determine the starting point. So that works. For indoor workouts such as yoga or indoor rowing, the exact location is also displayed in the fitness app. I would now also like to read out this location for these indoor workouts in my app. Does anyone know how to do this?
2
0
848
Apr ’25
Has HealthKit Changed GPS Standards in iOS 18.4 Beta 4?
I am a developer from mainland China. Today, I noticed that the HKWorkoutRoute data stored by my app in HealthKit shows significant discrepancies when viewed on the workout route map in the Health and Fitness apps on iOS 18.4. Instead of displaying the actual movement path, the route appears to be offset by several hundred meters. I collected this data using my app on watchOS 11.3.1, and all CLLocation data comes directly from Core Location. I did not convert WGS84 standard data to GCJ02. Reviewing historical data, all workout routes before March 17, 2025, appear correct, but every record after that date exhibits the offset issue.
2
0
121
Mar ’25
怎样读取健康记录心理状态的情境,并将自己APP的数据传入进去
读取是不是解析 metadata 的对应键来获取值对吧~但我看了相关开发文档好像没找到这个的键是什么~于是也没法写入到对应的,现在只能自定义键来进行写入 但是这样写入后无法显示在心情下方的影响因素后面~ 这个 key 是没公开的吗还是说我方法弄错了~请各位大大指教
2
0
102
May ’25
Statistics collection query first result returned is wrong
I'm reading hourly statistics from HealthKit using executeStatisticsCollectionQuery (code below). Expectation What I expect is to get back the list with one row per hour, where each hours has the same cumulative sum value. Actual result In results, first hour always contains less calories than next hours, which all have the same value. Example: Start: 2025-06-02T00:00:00+03:00, anchor: 2025-06-02T00:00:00+03:00, end: 2025-06-02T12:00:00+03:00 🟡 2025-06-02T00:00:00+03:00 Optional(50.3986 kcal) 🟡 2025-06-02T01:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T02:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T03:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T04:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T05:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T06:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T07:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T08:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T09:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T10:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T11:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T12:00:00+03:00 Optional(14.0224 kcal) As you can see, here we have 2025-06-02T00:00:00+03:00 Optional(50.3986 kcal) Now, if I add one more hour to the request (from beginning of time window), the same hour has proper calories count, while newly added hour, has wrong value): 2025-06-01T23:00:00+03:00, anchor: 2025-06-01T23:00:00+03:00, end: 2025-06-02T12:00:00+03:00. 🟡 2025-06-01T23:00:00+03:00 Optional(50.3986 kcal) 🟡 2025-06-02T00:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T01:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T02:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T03:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T04:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T05:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T06:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T07:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T08:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T09:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T10:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T11:00:00+03:00 Optional(64.421 kcal) 🟡 2025-06-02T12:00:00+03:00 Optional(14.0224 kcal) And now first hour of the day, magically has more calories burned: 2025-06-02T00:00:00+03:00 Optional(64.421 kcal) I suspect similar things happen with other quantity types, but haven't yet found a way to reproduce it. Am I doing something wrong or is it a bug in HealthKit? Code let anchorDate = startDate let predicate = HKQuery.predicateForSamples(withStart: startDate, end: endDate, options: [.strictStartDate]) healthStore.executeStatisticsCollectionQuery( quantityType: .basalEnergyBurned, quantitySamplePredicate: predicate, options: [.separateBySource, .cumulativeSum], anchorDate: anchorDate, intervalComponents: DateComponents(hour: 1), initialResultsHandler: { statistics, error in if let error = error { log(.error, "Error retrieving steps: \(error.localizedDescription)") continuation.resume(throwing: SpikeException("Error retrieving steps: \(error.localizedDescription)")) return } if let statistics { let f = ISO8601DateFormatter() f.timeZone = TimeZone.current for s in statistics { log(.debug, "\(f.string(from: s.startDate)) \(s.sumQuantity())") } } continuation.resume(returning: statistics ?? []) } )
2
0
116
Jul ’25
What’s the expected frequency of HealthKit enableBackgroundDelivery: HKCategoryTypeIdentifier.sleepAnalysis
Hello, I have enabled HealthKit background delivery for sleep analysis samples: private func setupSleepDataBackgroundDelivery() { if let sleepType = HKObjectType.categoryType(forIdentifier: HKCategoryTypeIdentifier.sleepAnalysis) { healthStore.enableBackgroundDelivery(for: sleepType, frequency: .immediate) { (success, error) in } } } In general, this function works. But I would love to know what the limitations / expected delivery delay for frequency: .immediate is. The documentation is only very vague about this and specifies that some sample types such as steps are only delivered once per hour. But how about sleep data? Is this expected to be delivered immediately once available on iPhone? Thanks a lot for your help!
2
2
374
Sep ’25
HealthKit Permission request throws error
Hi guys, We have an app that consumes data from Apple HealthKit. We use an HKObserverQuery to monitor changes in HealthKit data, and occasionally use regular HKSampleQuery requests when the app is in the foreground. Over the past few weeks, we’ve been encountering a significant number of errors when requesting additional HealthKit permissions (beyond what the user has already granted). The error message we’re seeing is: The operation couldn't be completed. (_UIViewServiceInterfaceErrorDomain error 2.) When this error occurs, all previously granted HealthKit permissions are automatically revoked, which is highly disruptive. We have a few questions and would greatly appreciate any insights or explanations regarding this behavior: Could this error occur if a permission request is triggered right as the app moves to the background? Why would previously granted permissions be revoked automatically after this error? If this is due to some internal behavior in iOS (e.g., a system-level protection or timeout), is there any known workaround or best practice to prevent this from happening? Thanks in advance for your help!
2
0
117
Jul ’25
HealthKit Background Delivery and URLSession.shared.dataTask
Hello. I have implemented background delivery for detecting changes in health kit with HKObserverQuery. It works well, I am reading changes. And I am sending this changes to an https endpoint with using an URLSession.shared.dataTask inside the HKObserverQuery callback while my app is terminated. I have several questions about this: Is starting a URLSession.shared.dataTask inside HKObserverQuery callback when app is terminated is correct way to do it? I am calling HKObserverQuery completion handler whatever dataTask returned success or failure but I am wondering what if the network connection is low and this dataTask response could not received in 2-3 seconds. I have read background deliveries should take 1-2 seconds. Should I use an URL session with background configuration for sending those HTTPS requests? If so, should I use download task or upload task (they don't fit my requirements I am sending a simple json)?
2
0
153
Aug ’25
Extremely persistent HealthKit read permissions issue
Overview of Issue My implementation of HealthKit is no longer able to read values due to authorization issues (ex. "HealthKitService: Not authorized to read HKQuantityTypeIdentifierHeight. Status: 0"). I have been through every conceivable debugging step including building a minimal project that just requests HealthKit data and the issue has persisted. I've tried my personal as well as Organizational developer teams. My MacOS and Mac Mini. Simulator and personal device. Rechecked entitlements, reprovisioned certificates. This makes no sense. And I have been unable to find anything similar in the Developer forums or documentation. The problem occurs during the onboarding flow when the app requests HealthKit permissions. Even when the user grants permission in the HealthKit authorization sheet, the authorizationStatus for characteristic data types (like Biological s3x and Date of Birth) and quantity data types (like Height and Weight) consistently returns as .sharingDenied. This prevents the app from pre-filling the user's profile with their HealthKit data, forcing them to enter it manually. The issue seems to be environmental rather than a specific code bug, as it has been reproduced in a minimal test case app and persists despite extensive troubleshooting. Minimal test project: https://github.com/ChristopherJones72521/HealthKitTestApp** STEPS TO REPRODUCE Build app, attempt to sign in. No data is imported into the respective fields in the main app. Console logs confirm. PLATFORM AND VERSION iOS Development environment: Xcode Version 16.4 (16F6), macOS 15.5 (24F74) Run-time configuration: iOS 18.5 Relevant Code Snippets Here are the key pieces of code that illustrate the implementation and the problem: 1. Requesting HealthKit Permissions (HealthKitService.swift) This function is called to request authorization for the required HealthKit data types. The typesToRead and typesToWrite are defined in a centralized HealthKitTypes struct. // HealthKitService.swift func requestPermissions(completion: @escaping (Bool, Error?) -> Void) { guard HKHealthStore.isHealthDataAvailable() else { completion(false, HealthKitError.notAvailable) return } let typesToRead: Set<HKObjectType> = [ HKObjectType.characteristicType(forIdentifier: .dateOfBirth)!, HKObjectType.characteristicType(forIdentifier: .biologicals3x)!, HKObjectType.quantityType(forIdentifier: .height)!, HKObjectType.quantityType(forIdentifier: .bodyMass)! ] let typesToWrite: Set<HKSampleType> = [ HKObjectType.workoutType(), HKObjectType.quantityType(forIdentifier: .activeEnergyBurned)! ] healthStore.requestAuthorization(toShare: typesToWrite, read: typesToRead) { success, error in DispatchQueue.main.async { if let error = error { print("HealthKitService: Error requesting authorization: \(error.localizedDescription)") completion(false, error) } else { print("HealthKitService: Authorization request completed. Success: \(success)") completion(success, nil) } } } } 2. Reading Biological s3x (HealthKitService.swift) This function attempts to read the user's biological s3x. The print statements are included to show the authorization status check, which is where the issue is observed. // HealthKitService.swift func readBiologicals3x() async throws -> HKBiologicals3xObject? { guard HKHealthStore.isHealthDataAvailable() else { throw HealthKitError.notAvailable } let s3xAuthStatus = healthStore.authorizationStatus(for: HKObjectType.characteristicType(forIdentifier: .biologicals3x)!) print("HealthKitService: Auth status for Biological s3x: \(s3xAuthStatus.rawValue)") guard s3xAuthStatus == .sharingAuthorized else { print("HealthKitService: Not authorized to read Biological s3x.") throw HealthKitError.notAuthorized } do { return try healthStore.biologicals3x() } catch { print("HealthKitService: Error executing biologicals3x query: \(error.localizedDescription)") throw HealthKitError.queryFailed(error) } } 3. Calling HealthKit Functions During Onboarding (OnboardingFlowView.swift) This is how the HealthKitService is used within the onboarding flow. The requestHealthKitAndPrefillData function is called after the user signs in, and it attempts to read the data to pre-fill the profile form. // OnboardingFlowView.swift func readHealthKitDataAsync() async { print("Attempting to read HealthKit data async...") // ... (calls to HealthKitService.shared.readDateOfBirth(), readHeight(), etc.) do { if let biologicals3xObject = try await HealthKitService.shared.readBiologicals3x() { if self.selectedGender == nil { switch biologicals3xObject.biologicals3x { case .female: self.selectedGender = .female case .male: self.selectedGender = .male case .other: self.selectedGender = .other default: break } } } } catch { print("OnboardingFlowView: Error reading Biological s3x: (error.localizedDescription)") } print("OnboardingFlowView: Finished HealthKit data processing.") } Console Logs Attempting to read HealthKit data async... HealthKitService: Reading Date of Birth... HealthKitService: Current auth status for DOB (during read attempt): 0 HealthKitService: Not authorized to read Date of Birth. Status: 0 OnboardingFlowView: Error reading Date of Birth: The operation couldn’t be completed. (Strike_Force.HealthKitError error 2.) HealthKitService: Reading Height... HealthKitService: Current auth status for HKQuantityTypeIdentifierHeight (during read attempt): 0 HealthKitService: Not authorized to read HKQuantityTypeIdentifierHeight. Status: 0 OnboardingFlowView: Error reading Height: The operation couldn’t be completed. (Strike_Force.HealthKitError error 2.) HealthKitService: Reading Weight (Body Mass)... HealthKitService: Current auth status for HKQuantityTypeIdentifierBodyMass (during read attempt): 0 HealthKitService: Not authorized to read HKQuantityTypeIdentifierBodyMass. Status: 0 OnboardingFlowView: Error reading Weight: The operation couldn’t be completed. (Strike_Force.HealthKitError error 2.) HealthKitService: Pre-read check for Biologicals3x auth status: 1 (Denied) HealthKitService: Reading Biological s3x... HealthKitService: Current auth status for Biological s3x (during read attempt): 1 HealthKitService: Not authorized to read Biological s3x. Status: 1 OnboardingFlowView: Error reading Biological s3x: The operation couldn’t be completed. (Strike_Force.HealthKitError error 2.)
2
0
249
Sep ’25
Old HealthKit samples from WatchOS getting deleted and recreated years later
I have recently come across a couple of odd HealthKit step samples from WatchOS. They represent step data measured in 2022 by my Apple Watch, but they have a creation date ("Date Added to Health") within the past couple of days. These odd samples show a "View All Quantities" button at the bottom of the sample Details page in the Health app on iOS 26 (which I've never seen before); the button leads to a list of many small step quantities, almost as if some older, smaller samples were consolidated into these newer samples. Even weirder is that at least some of these samples seem to be getting re-created repeatedly. For example, I've seen the same sample with a "Date Added to Health" of 9/5/25, then 9/8/25, twice on 9/9/25, and twice on 9/10/25. These samples were originally created by WatchOS 9, and are not being deleted/recreated by any apps on my device. I have only observed it since I updated to the iOS 26 beta (and now the RC); my watch was still running iOS 18 the first time it happened, but it has also happened since my watch was updated to WatchOS 26 beta. I did some debug printing of the odd samples and the normal samples surrounding them for comparison. Here's a normal sample: Sample: 80AC5AC5-CBD7-4581-B275-0C2ACA35B7B4 6 count 80AC5AC5-CBD7-4581-B275-0C2ACA35B7B4, (9.0), "Watch6,1" (9.0) "Apple Watch" (2022-09-15 16:20:14 -0500 - 2022-09-15 16:20:16 -0500) Device: <<HKDevice: 0x10591eee0>, name:Apple Watch, manufacturer:Apple Inc., model:Watch, hardware:Watch6,1, software:9.0, creation date:2022-08-25 18:22:26 +0000> Source revision: <HKSourceRevision name:My Apple Watch, bundle:com.apple.health.EE83959D-D009-4BA0-83A5-2E5A1CC05FE6, version:9.0, productType:Watch6,1, operatingSystemVersion:9.0> Source: <HKSource:0x110588690 "My Apple Watch", bundle identifier: com.apple.health.EE83959D-D009-4BA0-83A5-2E5A1CC05FE6, localDeviceSource: 0, modification date: 2024-01-31 05:49:18 +0000> Date added: 2022-09-15 21:20:16 +0000 Days between end and add: 0 And here's one of the odd samples: Sample: 4982487F-1189-4F16-AB00-61E37818A66D 676 count 4982487F-1189-4F16-AB00-61E37818A66D, (9.0), "iPhone12,1" (16.2) "Apple Watch" metadata: { HKMetadataKeySyncIdentifier = "6:38082859-D9C8-466A-8882-53443B2A2D94:684969619.25569:684970205.31182:119"; HKMetadataKeySyncVersion = 1; } (2022-09-15 16:20:19 -0500 - 2022-09-15 16:30:05 -0500) Device: <<HKDevice: 0x10591ce40>, name:Apple Watch, manufacturer:Apple Inc., model:Watch, hardware:Watch6,1, software:9.0, creation date:2022-08-25 18:22:26 +0000> Source revision: <HKSourceRevision name:My Apple Watch, bundle:com.apple.health.EE83959D-D009-4BA0-83A5-2E5A1CC05FE6, version:9.0, productType:iPhone12,1, operatingSystemVersion:16.2> Source: <HKSource:0x110588640 "My Apple Watch", bundle identifier: com.apple.health.EE83959D-D009-4BA0-83A5-2E5A1CC05FE6, localDeviceSource: 0, modification date: 2024-01-31 05:49:18 +0000> Date added: 2025-09-08 21:11:12 +0000 Days between end and add: 1088 Here's that same odd sample a day later, apparently recreated: Sample: 9E8B12FC-048D-4ECD-BE5B-D387AADE5130 676 count 9E8B12FC-048D-4ECD-BE5B-D387AADE5130, (9.0), "iPhone12,1" (16.2) "Apple Watch" metadata: { HKMetadataKeySyncIdentifier = "6:38082859-D9C8-466A-8882-53443B2A2D94:684969619.25569:684970205.31182:119"; HKMetadataKeySyncVersion = 1; } (2022-09-15 16:20:19 -0500 - 2022-09-15 16:30:05 -0500) Device: <<HKDevice: 0x12f01c4e0>, name:Apple Watch, manufacturer:Apple Inc., model:Watch, hardware:Watch6,1, software:9.0, creation date:2022-08-25 18:22:26 +0000> Source revision: <HKSourceRevision name:My Apple Watch, bundle:com.apple.health.EE83959D-D009-4BA0-83A5-2E5A1CC05FE6, version:9.0, productType:iPhone12,1, operatingSystemVersion:16.2> Source: <HKSource:0x12f0f8230 "My Apple Watch", bundle identifier: com.apple.health.EE83959D-D009-4BA0-83A5-2E5A1CC05FE6, localDeviceSource: 0, modification date: 2024-01-31 05:49:18 +0000> Date added: 2025-09-09 20:53:18 +0000 Days between end and add: 1089 It's worth pointing out some differences between the "normal" and "odd" samples (besides the "View All Quantities" button in the Health app). The recreated "odd" samples have a different Source Revision - the "productType" and "operatingSystemVersion" refer to my iPhone, not the Apple Watch device that actually captured the samples. The odd samples also have metadata keys that don't exist in the other samples - HKMetadataKeySyncIdentifier and HKMetadataKeySyncVersion. Questions I'm hoping someone can help with: What are these samples? Why/how do they have a "View All Quantities" button that shows sub-samples? Is this new to iOS 26? Why are some of the samples getting recreated multiple times?
2
0
157
Sep ’25
Icon Composer - Icon not visible in Fitness App
Hi everyone, we’re developing an app that lets users export selected bike rides to the HealthKit ecosystem. We created our app icon using the Apple Icon Composer and referenced the composer file in Xcode. Everything works fine, except that the logo doesn’t appear correctly in the Fitness app. Has anyone experienced this issue or knows how to fix it?
2
1
346
Nov ’25