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Sleep Smart — Support

A free, private smart alarm for Apple Watch.

Questions, bugs, or feature ideas:

Please include your iPhone and Apple Watch models and their iOS/watchOS versions — it makes almost every problem faster to solve.

Getting started

  1. Install Sleep Smart on your iPhone; the watch app installs alongside it.
  2. Open the app on your iPhone and allow Health and Notifications access.
  3. Set your wake time on the Home tab.
  4. At bedtime, open Sleep Smart on your Apple Watch, check the time shown, and tap Start Sleep. Wear the watch to bed.

Want to see the wake before trusting a night to it? On the watch, tap Try a 90-second demo — it runs the real alarm on a compressed window, and the result is discarded rather than saved.

Frequently asked

Does it work without an Apple Watch?

No. The heart-rate and motion sensing that picks your wake moment lives on the watch. The iPhone app on its own can only set the schedule and show past nights, plus an optional backup alarm notification.

The alarm didn't go off.

Check, in this order: the watch was worn and unlocked overnight; the watch had enough battery to reach your wake time; Sleep Smart was left on screen after tapping Start Sleep (pressing the Digital Crown to leave the app ends the session); and Health access was granted on the watch, not just on the iPhone. Keeping the iPhone backup alarm switched on in Settings covers the rest.

Why does it record a workout while I sleep?

Apple Watch only delivers continuous heart rate to an app during a workout session, so Sleep Smart runs a quiet one overnight. That is the entire reason it exists, and it is why Health asks for workout permission.

How much battery does a night cost?

An overnight session with continuous heart rate is meaningfully more than idle. Charge the watch while you wind down — an hour before bed is usually plenty for the night.

Can I wake up without sound?

Yes. Turn on Haptic-only when editing the alarm and Sleep Smart wakes you with taps on the wrist alone.

Where is my sleep data stored?

On your iPhone and Apple Watch, and in Apple Health if you allowed the write. Nothing is uploaded — Sleep Smart has no servers and no network code. See the privacy policy.

How do I delete everything?

Delete the app from your iPhone; the watch app and its stored data go with it. Anything already written to Apple Health stays in Health, where you can delete it yourself.

Is it really free?

Yes — every feature, no subscription, no in-app purchases, no ads.