Hi everyone, I’m building a sports performance app for Apple Watch that uses the onboard IMU to analyze swings and impacts in sports like tennis and golf. The goal is to estimate club/racket head speed, ball speed, and shot quality in real time from wrist motion data. With Core Motion, I can currently get deviceMotion updates at ~100 Hz. While this is fine for general movement tracking, the actual ball impact happens much faster — 5–10 ms in tennis and ~0.5 ms in golf. Many of the high-frequency vibration/impact components are missed at 100 Hz, making it hard to directly measure or more accurately estimate certain performance metrics. Questions for Apple / community: 1. Is there a way to access raw accelerometer and gyroscope data at higher sampling rates (e.g., 500–1000 Hz) on Apple Watch? 2. If not, is this due to hardware limitations or an API/software constraint? 3. Are there any research, partner, or beta programs that allow deeper sensor access for sports-science use cases? Even modest increases in IMU sampling could unlock more accurate ball-speed estimates, impact force analysis, and strike-quality detection without needing external sensors — making Apple Watch a best-in-class wearable for precision sports analytics. Happy to share more about the current approach, sample data, and potential use cases if helpful. Thanks, Max

Hello everyone! I encountered a problem, Apple Watch 10, downloaded beta version 26 IOS, got tired of it, deleted in the settings to the previous IOS. As a result, now I deleted 26 IOS on the phone and can not connect the watch with the phone.

I updated my IntentWidgetProvider recommendations() to return an empty array instead of all my previous static IntentRecommendation to allow my widgets to finally be configurable. When I go to the watch widget chooser I see samples of my widgets OK: But when I touch the sample would should bring up my configurations, I get "Unable to Load": Anybody see this or have any ideas? Thanks.

EKEventStore on Apple Watch is not giving me all calendars. I can see only calendars of the source 'Subscriptions', but non of the calendars of source CalDAV (iCloud). This problem exists over multiple apps. Code works fine on iPhone. Any ideas? Minimal example code: import SwiftUI import EventKit struct ContentView: View { let eventStore = EKEventStore() @State var success: Bool = false @State var calendarNames: [String] = [String]() func request() async { success = (try? await eventStore.requestFullAccessToEvents()) ?? false } func list() { calendarNames = eventStore.calendars(for: .event).map { $0.title } } var body: some View { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Access: \(success.description)") ScrollView { ForEach(calendarNames, id: \.self) { name in Text(name) } } } .onAppear { Task { await request() list() } } .padding() } }

Has anyone seen the workout buddy options on watch OS yet? I am not able to get it on my watch. My setup is an iPhone 16 and Watch Ultra 1 with the 26 OS I am currently using beta 3. English US language on both and US as region. I am located in Germany though. I restarted both devices multiple times without any changes. Hopefully someone can help.

Developing a standalone app for the Apple Watch. Unless I turn off Bluetooth on the paired iPhone, the Apple Watch’s Wi-Fi deactivates every ~30 seconds, which causes the connection to Xcode to drop. How is this supposed to work? I can see my app’s logs in Xcode, but I can’t view any other system logs from the Apple Watch. I tried using the Console app, with the iPhone connected via USB, trusted, etc, but I don't see any system logs. How can I access full system logs? Thanks!

Exercise caution applying Beta 2 on a Hermes Apple Watch. A number of anecdotes (including my own) that this causes very rapid battery drain, i.e. minutes, followed by a cycle of lower power mode, and very slow charge as battery drain seems as fast as charge so it tops out in low single digit %. Any interaction seems to cause the cycle to recur, rendering the watch in effect unusable. The connection to the phone is also broken, with the Watch app crashing after 1–2 seconds, 100% repeatably. This post is to caution avoidance, but a fix is going to be problematic if the watch can't get anywhere near 50% charge. The "anecdata" that this is widespread specifically with Hermes watches is: https://forums.macrumors.com/threads/watchos-26-beta-thread.2458443/page-5?post=33976625#post-33976625 And: https://www.reddit.com/r/watchOSBeta/comments/1lipud8/comment/mzh6ekt/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button Emailed through developer.apple.com with case ID 102630146259. Submitted feedback FB18336070 & FB18323575.

I was wondering which is the preferred way to send a lot of data from sensors of the apple watch to server. It is preferred to send small chucks to iphone and then to server or directly send bulk data to server from watch. How does it affect battery and resources from watch ? Are there any triggers that I can use to ensure best data stream. I need to send at least once a day. Can I do it in background or do I need the user to have my app in the foreground ? Thank you in advance

Hi everyone, I'm building a health-focused iOS and watchOS app that uses WatchConnectivity to sync real-time heart rate and core body temperature data from iPhone to Apple Watch. While the HealthKit integration works correctly on the iPhone side, I'm facing persistent issues with WatchConnectivity — the data either doesn't arrive on the Watch, or session(_:didReceiveMessage:) never gets triggered. Here's the setup: On iPhone: Using WCSession.default.sendMessage(_:replyHandler:errorHandler:) to send real-time values every few seconds. On Apple Watch: Implemented WCSessionDelegate, and session(_:didReceiveMessage:) is supposed to update the UI. Both apps have WCSession.isSupported() checks, activate the session, and assign delegates correctly. The session state shows isPaired = true and isWatchAppInstalled = true. Bluetooth and Wi-Fi are on, both devices are unlocked and nearby. Despite all this, the Watch never receives messages in real-time. Sometimes, data comes through in bulk much later or not at all. I've double-checked Info.plist configurations and made sure background modes include "Uses Bluetooth LE accessories" and "Background fetch" where appropriate. I would really appreciate guidance on: Best practices for reliable, low-latency message delivery with WatchConnectivity. Debugging steps or sample code to validate message transmission and reception. Any pitfalls related to UI updates from the delegate method. Happy to share further details. Thanks in advance!

I have FB12696743 open since July 21, 2023 and this happened again today. I get home at approx 10 mins after the hour, walk appox 50 ft across my yard, up 5 steps into my house, let the dog out and pace on my deck watching the dog, go back in the house walk around the kitchen while preparing dinner. A total of about 200 ft. I sit down about 35 past the hour and start to eat and at 10 mins to the next our and I get the reminder to stand. On the other side I wake up at 5 mins to hour. Walk 8 steps to the bathroom and successfully achieve the stand for that hour. WHY!?!?!? 😁🤣

The sequence of events when Fall Detection is triggered is not clear from the documentation. https://developer.apple.com/forums/thread/763738 This post assumes that when a fall is detected by the watch, the standard UI ("It looks like you've taken a hard fall...") is shown, and only after this is resolved (user taps an option or times out) is an event sent to the CMFallDetectionDelegate in our app - is that correct? Is it possible instead to have our delegate be notified of a fall event immediately, and let our app's UI present options for next steps to the user?

As a third-party application on Apple Watch, can it be located in the same LAN httpServer? Currently, when testing to initiate an http request in the LAN, the connection timeout is returned, code: -1001 self.customSession.request("http://10.15.48.191:9000/hello").response { response in switch response.result { case .success(let data): dlog("✅ 请求成功，收到数据：") if let html = String(data: data ?? Data(), encoding: .utf8) { dlog(html) } case .failure(let error): dlog("❌ 请求失败：\(error.localizedDescription)") } } 执行后报错 Task <B71BE820-FD0E-4880-A6DD-1F8F6EAF98B0>.<1> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "请求超时。" UserInfo={_kCFStreamErrorCodeKey=-2102, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <B71BE820-FD0E-4880-A6DD-1F8F6EAF98B0>.<1>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <B71BE820-FD0E-4880-A6DD-1F8F6EAF98B0>.<1>", "LocalDataPDTask <B71BE820-FD0E-4880-A6DD-1F8F6EAF98B0>.<1>", "LocalDataTask <B71BE820-FD0E-4880-A6DD-1F8F6EAF98B0>.<1>" ), NSLocalizedDescription=请求超时。, _kCFStreamErrorDomainKey=4, NSErrorFailingURLStringKey=http://10.15.48.191:9000/hello, NSErrorFailingURLKey=http://10.15.48.191:9000/hello}

I would like to know the distribution of watchOS by OS version. Further research shows iOS version distribution, but there appears to be no mention of Watch OS. I am currently developing an App and would like to decide which version of Watch OS to start supporting due to cost issues, and would like to use the market distribution to determine this. Please help others or experts who want to do something like me! Translated with DeepL.com (free version)

We are developing a mobile app focused on lone worker protection, which does not include any fitness tracking features. We require the use of HKWorkoutSession solely to enable background execution of critical safety-related code. Could you please confirm whether this use of HKWorkoutSession is permitted under App Store Review guidelines, given that our app does not offer fitness or workout-related functionality?

I have encountered a problem that the Apple Watch cannot automatically continue playing the music in my playlist even if I have press the cycle button. It stops every song. And I used Apple Music. All these are performed without iPhone. But after restarted the watch, it works fine. I use S10 GPS watch with watch os 11.3.1. I never restarted the watch after I renewed the system. And i believe the problem have existed for more than one year as i saw a post describe the same problem on social media.

I attempted to reset the Watch SE, which is currently running 10.6.1 and enrolled in Beta updates. My iPhone is updated to 18.2, but the Watch app isn't showing any available updates.

I am developing a watchOS app with a tab view, and inside one of the tabs, I have a 2x2 collection view layout. Each collection item contains a view that handles: Tap Gesture (.onTapGesture) → Executes an action immediately. Long Press Gesture (LongPressGesture) → Triggers an update when long press starts and again when it ends. Drag Gesture (DragGesture) → Updates the position while dragging and resets values when the gesture ends. Issue: Most of the time, the gestures work correctly, but if another finger swipes on the screen while a long press is active, sometimes the onEnded event does not trigger, leaving the button in an active state. Observations: The onTapGesture executes normally without issues. The LongPressGesture starts as expected, but if another finger interacts with the screen, the onEnded of the drag gesture does not always trigger. This results in the button remaining visually or functionally "pressed" until another interaction occurs. Has anyone encountered similar behavior in watchOS? How can I ensure that long press and drag gestures always complete even when another finger swipes on the screen? Thanks in advance!

There doesn't seem to be a background mode that will allow an iPhone app to run in the background in order to communicate with its watch app, which is running in the foreground on the watch. Have I missed something? Related but not quite the same: say the iPhone app can run in the background to get location updates. But it only wants to do so when the watch app is running. Is there a way that the watch app can wake, or even start, the iPhone app, and for the iPhone app to then enable location updates? (I have previously implemented Bluetooth background modes - I think I could achieve both of the above if I had the watch and the iPhone communicate using my own BTLE protocol, rather than using Watch Connectivity. Is this true?)

Got a Watch SE recently only to find out that I can't deploy apps to it from Xcode even once. I always get the message "Connecting to Watch" and "Reconnecting to Watch". Tried with Xcode 16 and then with 16.2. Same result. For countless times, I have tried every possible solution posted on this forum and elsewhere but to no avail. Filed a feedback, no reply yet from Apple. Looks like something is seriously broken. Please fix this. FB16122816

Hello, since an update in September, the alarm widget on the watch face no longer counts down accurately like it used to. This is extremely frustrating for me because I used it for work so I have know exactly how much time I had in a particular circumstance. So for example, say I have an alarm set for 12:30. Before the update in September, I was able to look at my watch and know immediately that I had 24 minutes before the alarm, or look again and know it was the. 10 minutes before the alarm. Now, if I look at the watch face, it will say I have 24 minutes before the alarm, but it may actually only be 10 minutes before the alarm. I understand for some people this may be trivial, but it is really disappointing for me, and renders one of the most useful features of the Apple Watch useless to me now. I am hoping this is just an oversight during an update, so looking to see if this is something that is currently being worked on? I just installed beta 11.3 and still having the same issue. Now, if I press and hold on the watch face, like I’m going to change watch faces, then click out of it. It does update it. But it is not the same as it used to be. Thank you