A little clarity.
Before bedtime.

Overnight monitoring and wrist wake-up use Apple Watch. Your iPhone is where you plan, see detailed records and use breathing and sound tools. Check the release requirements when a download becomes available.

Yes. On the Watch, tap Start tonight and check that monitoring has begun. Your wake preferences stay saved, but saving a time on the phone does not by itself start a monitoring session.

On the phone, open Me, then Settings and Wake preferences. Choose No early wake for a fixed time, or select an available early window. You can also change your wake preferences on the Watch before a session.

The app estimates stages from wrist movement and heart rate. It does not directly measure brain activity or eye movements. Light, deep and REM in the report are estimates, and missing data can affect them.

The app has its own Watch recording and stage-estimation flow, bedtime planning, wake-window rules and morning review. It can also read available Health records, with permission, as a separate source for comparison and supporting measurements.

No. It looks for a suitable moment within your chosen window using recent estimates. The rules can also consider REM late in the window, and the deadline fallback may occur in any stage. Keep a backup alarm for an important morning.

Current wake decisions happen locally on the Watch. AI is used for requested explanations, weekly reviews and conversations, not to continuously control the overnight alarm.

There may be too few usable samples, an interrupted session, an incomplete sync, or a Health record with no stage labels. The app should retain unknown or unspecified periods rather than inventing a detailed stage for them.

The app treats cycle length as an estimate and uses a reference model until enough usable history is available. Its suggested bedtime is a guide; it cannot predict the exact stage you will be in at a particular time.

A weekly review sends selected summary metrics. A chat sends summary context and the conversation text you provide. These requests pass through the app service. The privacy page describes this separately from account syncing.

A public installation link is not listed on this website yet. The Get the app page shows the current access information and how to contact us about availability.

The app includes invitation-based sharing of selected information from the most recent night. Both people choose to link, and either can end the link. It is not a live monitoring or emergency service; fields can be absent when they have not synced.