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No Sensor Data

Before We Start

If you genuinely have not been wearing your Watch and you are getting the not been wearing your Watch banner over the clock, then it is best to wait until you have been wearing the Watch for a few hours. Ideally wear it overnight. The app needs data in order to set things up properly. The setup is not for data capture, it is for data analysis and sleep detection using existing data. For this, it needs data to work with.  

Identifying & Solving Problems

Occasionally you will find that either AutoSleep has no access to your Watch sensor data, or, your Watch is not capturing any data.

The Watch is supposed to do this automatically regardless of whether or not the app is installed. 

How to Prove This

This is very easy to prove. 

  1. Go into Apple Health app. It has a white icon with a red heart. 
  2. Press Health Data tab. 
  3. Press Vitals. 
  4. Press Heart Rate.
  5. Press Show All Data. 
  6. Select a day. 

All heart rate readings for the day are listed here. 

Scroll to see the times that you wore your watch whilst sleeping. 

If the watch is functioning correctly, you will see heart rate readings every 2-10 minutes

Common Causes

The most common problem is permissions, but this is closely followed by people that either don’t use a password or have wrist detection turned off. Both of these disable the Watch’s background health sensors. 

What to do?

The first thing to try is this:

Important: make sure that you do every step in this order. Often the problem is due to OS services crashing and this restores them as well as the app’s permissions. 

  1. Delete the AutoSleep app from your iPhone. Make sure you keep any health data when asked. This is in the second message you get when you confirm deletion. 
  2. Reboot the iPhone by pressing home + sleep wake button (volume down & sleep wake for iPhone 7) until you see 
  3. Reboot the Watch by pressing the crown and side button simultaneously until you see 
  4. Download AutoSleep app. 
  5. Now go into AutoSleep app and carefully accept permissions. 

This can sometimes completely fix the problem. 


If the above doesn’t solve it, then here are the likely causes for the Watch to cease capturing background heart rate. 

  1. Did you enter your passcode when you put your watch on your wrist before going to sleep? If not then it will not have access to read sensor data. (If you don’t use a passcode, background health data sensors are disabled for privacy reasons). 
  2. Is your Apple Watch coming loose while you are asleep? Some wear the watch above the wrist bone and this can cause problems as the watch sensors lose contact. 
  3. In the Apple Watch app (black icon with picture of Watch) check in privacy, motion and fitness that you have heart rate turned on?
  4. In Apple Watch app, General make sure that Wrist Detection is turned on. 
  5. Did your watch go into power saving mode at any time? This turns off all sensors.
  6. Did you use airplane mode? If so, the data will not be sent to the iPhone until you have turned off airplane mode and the Watch has had time to synch all of its data to the iPhone. It is best to turn off airplane mode before you put the Watch on charge. Otherwise, just be aware that the data won’t synch until you wear your Watch again. (It is fine to use airplane mode, just keep this in mind). 


If you have re-installed the app and checked everything in the check list and you are still not able to see heart rate data in the Apple Health app for the times that you are wearing the Watch whilst sleeping, the next troubleshooting step is to re-pair your Watch and iPhone. 

IMPORTANT: We've found that most people have success when setting up as a new Watch instead of taking the restore from backup option, which tends to carry across old problems. 

Still Having Problems?

If you are still stuck, then please email using the support button in the app. This will send us some configuration information to assist in helping you.