Your first night
- Install the available app build on your paired iPhone and Watch. Check access information.
- Open the apps and review the permissions requested for Health, movement and notifications. Allow the data you want to use.
- Set your latest wake time. Choose your wake preferences in Settings if you want an early window.
- Charge your Watch, put it on, and tap Start tonight on the Watch.
- Check that the monitoring screen appears. For an important morning, keep a separate backup alarm.
I saved the time, but monitoring hasn't started.
Saving a wake time and starting a night are separate actions. Open the app on your Watch and start the session there. If you see a permissions or battery message, resolve it and check the monitoring state again.
Time & reminders
On the phone's Tonight screen, adjust the time, then confirm. Early-wake preferences are under Me → Settings → Wake preferences. In Chinese, look for 我 → 设置 → 唤醒偏好.
Choose No early wake for a fixed time. Otherwise, select an available window before your latest wake time. Settings are retained, and changes may be unavailable while monitoring is active.
The phone and Watch show different settings.
Check that the paired devices can communicate and open the app on both. A change can wait for a connection, and the Watch does not adopt a new wake plan in the middle of an active night. Confirm the actual wake time shown on the Watch before starting.
The reminder didn't happen.
Check whether a night actually started, whether the Watch had power, and whether the session ended or reported an error. Preserve the night record and note the time of the problem when contacting support. Do not rely on an unverified reminder for an important appointment.
Sleep records
I can't see last night's record.
Open the app on your Watch, then on the paired phone, and allow time for syncing. Check whether the Watch has a finished record. If the phone is displaying Health records, check that source separately; it is not the same as the app's overnight recording.
Why are the app and Health different?
They can use different measurements, algorithms and recording windows. The app distinguishes its own estimates from Health labels. A comparison between two estimates is not a sleep-lab accuracy test.
There is only “unspecified” or “unknown” sleep.
Unspecified Health sleep means that source supplied sleep without a detailed stage. Unknown app periods mean a stage was not established. Check the recording duration, available samples and gaps; the app should not turn missing labels into invented deep or REM sleep.
A sensor measurement is absent.
Supplementary readings such as blood oxygen or wrist temperature appear only when the device and Health store provide usable samples and access is available. A permission dialog completing does not by itself confirm that every sample type can be read.
A few ways to wind down
Open the Wind down tab (入睡) for a breathing guide and locally generated sounds. Select a sound, adjust the volume, and choose when it should fade out. Stop the sound or leave the guide whenever you want.
Guided stories and other audio marked Coming soon are not part of the current sound collection.
Account & AI
The AI assistant is unavailable.
Check your internet connection and the account or service status shown in the app. AI access depends on the available build and service configuration. A failed AI request does not become a new wake instruction for your Watch.
How do I manage my data?
Settings includes night-record export and local deletion controls. The account section has sign-out and cloud account deletion. These have different scopes: deleting local phone records is not the same as deleting your cloud account or the Watch's copies. See the data controls explanation.
How do I stop sharing with family?
Open the family area in Me and remove the link. Linking is mutual, and either participant can end it. Contact support if a link or shared field is not updating.
Tell us what's happening.
Include your app version, phone and Watch versions, and what you expected to happen. Please do not send your complete health export, password or API key.
Email support ↗support@tosleep.ai · Opens your email app.