Learn why sleep data may be missing, what to expect after syncing, and tips to avoid gaps and ensure accurate sleep data.
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Tips to avoid missing sleep data
- Make sure you wore your NOWATCH overnight
- Check the battery level before sleeping
- Open the app every morning and allow syncing to complete
- Make sure your watch is connected
- Keep the app running in the background
- Check whether the app was closed for too long
- Ensure your app and firmware are up to date
- Log sleep manually instead of editing detected sleep
Tips to avoid missing or inaccurate sleep data
If your sleep data isn’t showing, review the checks below.
1. Make sure you wore your NOWATCH overnight
Sleep metrics can only be recorded when the watch is on your wrist and the sensors stay in contact with your skin.
Wear the watch snugly above your wrist bone.
Make sure the strap is secure before going to sleep, as it may loosen during the night.
Before going to sleep, check that the green LED sensors light up when the watch is on your wrist
2. Check the battery level before sleeping
If the battery runs out overnight, no sleep data can be recorded.
Charge your watch before bed.
We recommend having at least 30% battery before sleeping.
3. Open the app every morning and allow syncing to complete
If the app hasn’t been opened since you woke up, your sleep data may not have synced yet.
Open the NOWATCH app in the morning.
In the Now screen, you'll see a question banner asking how you slept. Answer it so your reply can be reflected in the Sleep Summary.
Keep the Now screen open until the sync bar at the top finishes.
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Once your data syncs, you'll see a banner confirming your Sleep Summary is ready. Tap View Summary to get more details about your sleep.
Find your sleep data in the Timeline, Overview, and Sleep Summary screens.
4. Make sure your watch is connected
Sleep data will only sync if your watch is connected. You'll know by seeing the green circle at the top right of the Now screen.
5. Keep the app running in the background
Avoid fully closing the app before going to sleep. Keeping it open in the background helps maintain stable connectivity and consistent syncing.
6. Check whether the app was closed for too long
NOWATCH can store data for up to 24 hours. If the app isn’t opened within that time, older unsynced data may be overwritten.
To avoid this:
Open the app at least once per day.
Allow syncing to fully complete.
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