Health & Fitness

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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

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Workouts, activity rings, samples and more not syncing across devices running iOS 18 RC and watchOS 11 RC
I noticed last night that workouts I have been recording on my main carry device running 17.6.x have not been syncing to my beta devices running iOS 18 RC, iPadOS 18 RC and watchOS 11 RC. All devices are using the same Apple Account and I have iCloud enabled for Health data. The iPad running the RC has the syncing enabled in Profile. Is anyone else experiencing health data not propagating to the 18.x devices? Some of data exists on all devices but not all. For good measure I left the device unlocked on the health app last night for a long period of time to let it do its thing. This morning the data still hadn't propagated. I disabled and reenabled the synchronization on my iPad having chosen to delete all samples when disabling it. Hopefully all of my data dating back to the first Apple Watch in 2014 restores. FWIW my data set according to iCloud settings my health dataset is just shy of 650 MB. FB15102443 - Health / HealthKit: Workouts, activity rings, sample data, and more not syncing via iCloud to 18 RC device
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Sep ’24
Wake-up detection with HealthKit
Hello HealthKit Experts & Enthusiasts! I am building an app called one sec which forces people to take a deep breath before they can use social media apps (it’s using Shortcuts Automations for that). One important feature of one sec is the Good Morning Countdown: For a specified time after waking up (e.g. 30mins) selected apps are blocked completely. This helps to start the day screen-free. They way it works is, the user grants access to read HKCategoryTypeIdentifier.sleepAnalysis data. I have implemented a HKObserverQuery and enableBackgroundDelivery in order to be informed whenever new HKCategoryTypeIdentifier.sleepAnalysis becomes available. I noticed that when I have my device connected to Xcode, this works as expected. However, when I quit the app and launch it from my Home Screen, my observer query is not informed about new sleep data (except when my app is running in foreground). Any ideas? Furthermore, I have noticed that sometimes sleep data is provided delayed to HealthKit, many minutes (sometimes even longer) after waking up, no sleep samples are to be found in the Health app. Of course, for my app it is crucial to get accurate + timely so apps can be blocked accordingly. Is this an issue that the Apple Watch first needs to send the samples to the phone? Thanks a lot for your help!
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Sep ’24
Health Export not complete
Good evening, when I use the automatic export feature from my iPhone, it successfully exports data. When reading the Export.xml file it is dispayed completely, with about 3 mio lines. When I check the file I see, that a lot of data is missing. E.g. the iPhone dispays the heart rates for several exercises (from last year), which don't have any correspondence in the export.xml file. Current exercises have. I am a developer myself and parsed all files without any error. My iPhone has enough free space (200GB or so) and iCloud has more than a TB free. Internet is connected via 1GBit line, WLAN with 800MBit and everything runs smooth. I would like to get a COMPLETE export of all the health data, without having to write a program on my own to accomplish this. Thank you. /C
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Aug ’24
HealthKit quantity types are not documented when generated by the system and on which Apple Watch models
Finally at last Apple Health supports saving .distancePaddleSports, .distanceCrossCountrySkiing, .distanceRowing, .distanceSkatingSports, and much more. The backstory. In the land of 10,000 lakes, there hasn't been a way to save 'canoe' or 'kayak' distance and I've been asking for it for years. Thank you health team for adding it this year! FB7807993 - Add HKQuantityTypeIdentifier.paddleDistance for canoeing, kayaking, etc type workouts (June 2020) Prior we could just save the totalDistance to a workout, but since the HKWorkout initializers were deprecated we no longer have a supported way to save these distances in our workouts. The iOS 18 / watchOS 11 introduction addresses this. If you want to know more why you can't do this in earlier versions you can check these feedback titles: FB10281482 - HealthKit: Deprecation of totalDistance on a workout session of paddleSports breaks apps that used that to save distance to the workout because there is no "paddleDistance" type available to save as sample data (June 2022) FB12402974 - HealthKit: Deprecation of HKWorkout completely breaks support for third party fitness apps from saving non-standard workout distance (June 2023) Great, so there is new support that solves all of these requests and issues for the new version of the OSes. However, the downside is now that there is not much for documentation. Unlike the .runningSpeed and .runningPower introduced in iOS 16 / watchOS 9, none of the new iOS 18 / watchOS 11 types have documentation, at all. To some degree this is understandable, but types from last year still remain undocumented too. Without this information for the data types introduced in both iOS 17/18 and watchOS 10/11 it makes building and integrating with these new types difficult to say the least. We can't make assumptions about anything. Can we get a documentation update for new (and existing) quantity types for when Apple Watch will automatically generate samples? FB14236080 - Developer Documentation / HealthKit: Update documentation for HKLiveWorkoutDataSource typesToCollect for which sample types are automatically collected by watchOS 10 and 11 (July 2024) FB14942555 - HealthKit / Documentation: App Update Release Issue - HKQuantityTypeIdentifiers are missing documentation describing when the system automatically adds data (today) I know that the behavior has changed from release to release for some of these types, so documentation would be based on OS version. If you didn't catch it, watchOS 11 will now associate .cyclingSpeed for cycling workouts both indoor and outdoor. FB12458548 - Fitness: Connected cycling speed sensor did not save samples to health via cycling workout (June 2023 - received reply that only saved for indoor cycling, but not documented otherwise) FB14311218 - HealthKit: Expected outdoor cycling to include .cyclingSpeed quantity type as a default HKLiveWorkoutDataSource type to collect (July 2024) To the other third party fitness apps out there, how are you managing the knowledge of which devices collect which data types on which versions of the OS? Sure, we could look at the HKLiveWorkoutDatSource and inspect the typesToCollect property across a bunch of devices, but again that is trial by error not 'as documented'. Is the behavior of simulators guaranteed to match the behavior of real devices? Maybe, but also maybe not. Fingers crossed for a nice documentation update to spell out all of the behavioral details. Apple folks / DTS, many of the above feedbacks are addressed and I plan to update or close them after the releases this fall. Some are still outstanding. P.S. I hope that .paddleSports gets deprecated and split into individual activity types like skiing did years ago. Their MET scores are different according to the research on the physical activity compendium site. FB7807902 - Split HKWorkoutActivityType.paddleSports into their own activity types (June 2020)
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Aug ’24
Developer Build Icon not showing in Apple Fitness
I am building an app that sends workout data to Apple Fitness. During development I noticed that my App Icon does not show up in Apple Fitness and it's just a blank space. The Icon seems to show just fine in Apple Health but not in Apple Fitness. I did the same test with the production version of my app and I can see the production icon just fine in Apple Fitness. I am trying to find information about which app Apple Fitness uses since it seems to differ from the one Apple Health uses. ChatGPT seems to think that Apple Fitness uses the App Store Connect icon (which I have for my prod app but not my dev app), but I cannot seem to verify that assumption with any kind of documentation. Can I please get information about which icon specifically Apple Fitness uses when displaying third party app integration information?
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Aug ’24
Health app iOS 18 Public Beta: Can't record Sleep Process with iPhone only (without wearable)
Hello! My sleep process isn't recorded with iPhone only (without wearable device) on iOS 18. On previous iOS versions it was recorded but now it doesn't work. I compare iOS 17 and iOS 18 Beta and I see the difference that in Full Schedule was deleted tumbler "Track Time in Bed with iPhone" that helped to track sleep process without wearable device (I found it here: Health app -> Browse -> Sleep -> Your schedule block and tap on "Full Schedule & Options" -> Scroll to the bottom). I didn't find any information from Apple about this changes in change log. And one more time: I don't use Apple Watch or any wearable device. Do you have any information about sleep tracking with iPhone only? Can I track sleep process only with iPhone?
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Aug ’24
HealthKit ID is the same with another Device
HealthKit tracker Id is the same with another Device, We are using an application to track our health progress and we are trying to connect our HealthKit to monitor our health data (steps and calories) but unfortunately we can't connect to the app (another application) at the same time because two devices is sharing just one health kit tracker ID. Can anyone help me to resolve this issue? Old phone was used by the other person before changing to new phone
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Aug ’24
watchOS 11 beta 5 - Problem workout duration wrong on automatically appearing widget
On watchOS 11 when starting a workout session a widget appears automatically on the smart stack showing the pause or resume button. It´s a great feature, but my problem is that the duration is not showed correctly because the prepare phase of the workout and the pause / resume events are not taken into account calculating the duration. In my project I don´t use the workout builder. I have made a sample project with workout builder and there the duration is shown correctly. It would be great if this automatically appearing widget would also show the time correctly in case the workout builder is not used (prepare phase and pause resume events considered, otherwise it looks like a bug). Is there any way to opt out of this automatically appearing widget or could this be fixed? Any comments from an Apple engineer on this?
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Aug ’24
Missing app icon in the Fitness app
My iOS app has a correctly configured HealthKit integration. It successfully delivers all samples and data to HealthKit. For every workout sent to HealthKit, I can see the duration, workout name, calories, and other details. However, the app icon is missing. My project uses the Single Size setting for the app icon in the XCAssets folder. The app is available in the App Store in some regions. What can I do to fix this issue? The problem persists regardless of whether the device is running iOS 17 or 18.
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Aug ’24
Hi everyone,I'm developing a visionOS app using SwiftUI and RealityKit. I'm facing a challenge with fetching step data from HealthKit.
I have integrated HealthKit into my app to track and display step data. On my iPhone, the step data syncs and shows up immediately. However, when I try to fetch and display this data on my Vision Pro app, there's a noticeable delay before the data appears, even though I've given the necessary permissions and synced data through iCloud. Memory updated Here is your question in a similar format: Hi everyone, I'm developing a visionOS app using SwiftUI and RealityKit. I'm facing a challenge with fetching step data from HealthKit. Scenario: I have integrated HealthKit into my app to track and display step data. On my iPhone, the step data syncs and shows up immediately. However, when I try to fetch and display this data on my Vision Pro app, there's a noticeable delay before the data appears, even though I've given the necessary permissions and synced data through iCloud. Question: Why is there a delay in fetching step data from HealthKit on my Vision Pro app, and how can I reduce this delay to ensure real-time data display? Additional Information: I'm using HKStatisticsQuery to fetch the step data for the current day. The authorization for HealthKit is requested successfully. The data shows up after some time, but the initial delay is causing a poor user experience. Here is the relevant code snippet for fetching today's steps: class HealthManager: ObservableObject { let healthStore = HKHealthStore() @Published var activities: [String: Activity] = [:] init() { let steps = HKQuantityType(.stepCount) let healthTypes: Set = [steps] Task { do { try await healthStore.requestAuthorization(toShare: [], read: healthTypes) } catch { print("error fetching health data") } } } func fetchTodaySteps() { let steps = HKQuantityType(.stepCount) let predicate = HKQuery.predicateForSamples(withStart: .startOfDay, end: Date()) let query = HKStatisticsQuery(quantityType: steps, quantitySamplePredicate: predicate) { _, result, error in guard let quantity = result?.sumQuantity(), error == nil else { print("error fetching today's step data") return } let stepCount = quantity.doubleValue(for: .count()) print("stepCount \(stepCount)") } healthStore.execute(query) } } I'm open to alternative approaches if this method isn't the most efficient for real-time data fetching. Thanks in advance for any insights or suggestions! Best, Siddharth
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Aug ’24
CMBatchedSensorManager referenced on a iOS 15 device
We have an app that takes data from the accelerometer of the iPhone and watchOS. Some updates ago we included the high-frequency accelerometer for the watchOS with the CMBatchedSensorManager framework. We didn't test our app on iOS 16 or 15 devices, where that framework is unavailable, because the update was just for watchOS. We refer to that class just on a shared class, and was wrapped with an #if os(watchOS) condition. In our iPhone app, we import the CoreMotion framework but CMBatchedSensorManager is not used. Now, when you run the app on a device with iOS 15 you find this issue: dyld[17071]: Symbol not found: (OBJC_CLASS$_CMBatchedSensorManager) Referenced from: '/private/var/containers/Bundle/Application/C3CC754F-1674-4CBD-AD83-93229DDCF38D/Spleeft.app/Spleeft' Expected in: '/System/Library/Frameworks/CoreMotion.framework/CoreMotion' We need a solution to keep running our app on devices with iOS 15.0
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Aug ’24
Can my iOS app access live cycling workout session data from the workouts app on the apple watch
Hello, I am trying to build a features where I want to monitor a user's biking workout session metrics like the current speed, average speed and distance travelled. I want to get these metrics as the user is actively doing a workout session in the Workouts app of the apple watch. Is it possible? Or it is not possible to get data from an active workout session from the workouts app.
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Jul ’24
Linker errors when building with Xcode 15 and CocoaPods — building for iOS
** BUILD FAILED ** The following build commands failed: Ld /Users/siddesh/Library/Developer/Xcode/DerivedData/App-ddpkkzvberburtewkcvoihnirgjh/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Logging.build/Objects-normal/x86_64/Binary/Logging normal x86_64 (in target 'Logging' from project 'Pods') (1 failure) Testing with xcodebuild. -> mySDK_Staging (8.8.0) - WARN | attributes: Missing required attribute license. - WARN | license: Missing license type. - WARN | source: Git SSH URLs will NOT work for people behind firewalls configured to only allow HTTP, therefore HTTPS is preferred. - WARN | [iOS] license: Unable to find a license file - ERROR | [iOS] xcodebuild: Returned an unsuccessful exit code. - NOTE | xcodebuild: note: Using codesigning identity override: - - NOTE | [iOS] xcodebuild: note: Building targets in dependency order - NOTE | [iOS] xcodebuild: note: Target dependency graph (20 targets)
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Jul ’24
Linker errors when building with Xcode 12 and CocoaPods — building for iOS
** BUILD FAILED ** The following build commands failed: Ld /Users/siddesh/Library/Developer/Xcode/DerivedData/App-ddpkkzvberburtewkcvoihnirgjh/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Logging.build/Objects-normal/x86_64/Binary/Logging normal x86_64 (in target 'Logging' from project 'Pods') (1 failure) Testing with xcodebuild. -> mySDK_Staging (8.8.0) - WARN | attributes: Missing required attribute license. - WARN | license: Missing license type. - WARN | source: Git SSH URLs will NOT work for people behind firewalls configured to only allow HTTP, therefore HTTPS is preferred. - WARN | [iOS] license: Unable to find a license file - ERROR | [iOS] xcodebuild: Returned an unsuccessful exit code. - NOTE | xcodebuild: note: Using codesigning identity override: - - NOTE | [iOS] xcodebuild: note: Building targets in dependency order - NOTE | [iOS] xcodebuild: note: Target dependency graph (20 targets)
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Jul ’24
Xcode 15 and CocoaPods — building for iOS failed with Ld error
** BUILD FAILED ** The following build commands failed: Ld /Users/siddesh/Library/Developer/Xcode/DerivedData/App-ddpkkzvberburtewkcvoihnirgjh/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Logging.build/Objects-normal/x86_64/Binary/Logging normal x86_64 (in target 'Logging' from project 'Pods') (1 failure) Testing with xcodebuild. -> mySDK_Staging (8.8.0) - WARN | attributes: Missing required attribute license. - WARN | license: Missing license type. - WARN | source: Git SSH URLs will NOT work for people behind firewalls configured to only allow HTTP, therefore HTTPS is preferred. - WARN | [iOS] license: Unable to find a license file - ERROR | [iOS] xcodebuild: Returned an unsuccessful exit code. - NOTE | xcodebuild: note: Using codesigning identity override: - - NOTE | [iOS] xcodebuild: note: Building targets in dependency order - NOTE | [iOS] xcodebuild: note: Target dependency graph (20 targets)
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Jul ’24