The purist Apple Watch sleep tracker — accurate, automatic and subscription-free — but it only measures sleep, it does not help you get it.
Best for Apple Watch owners who want accurate sleep data and no subscription.
AutoSleep is the purist Apple Watch sleep tracker. It tracks automatically and accurately, it is detailed, and it is a rare one-time purchase with no subscription. The trade-off is total focus: it measures sleep and does nothing else — no wind-down content at all.
How we tested: Evidence-based assessment — from public information, app-store data and independent 2026 reviews. Not based on a long hands-on trial by ONDA.
Automatic, detailed Apple Watch tracking — accurate, with a devoted following among watch owners.
Wind-down content
3.0
None at all — no sounds, no stories; AutoSleep does not try to help you fall asleep.
Sleep science
6.5
Sound metrics and a "sleep bank" concept, without a distinctive research method.
Insights and guidance
8.0
Detailed analysis and trends — readiness, debt and consistency — for those who want the data.
App experience
7.5
Powerful but dense — it rewards setup more than the polished mainstream apps.
Free tier
4.0
No real free tier — but it is a cheap one-time purchase, not a subscription.
Value
9.0
A few dollars, once, with no subscription — exceptional value in a category full of recurring fees.
Pros
+Accurate, automatic Apple Watch tracking
+A one-time purchase — no subscription
+Detailed analysis and trends
+No buttons — it just tracks
Cons
−No wind-down content whatsoever
−iOS and Apple Watch only
−A dense interface that rewards setup
−Measures sleep but does nothing to improve it
Price: $6 one-time; no subscription; iOS and Apple Watch only (as of 2026-05-16)
Where it leads
AutoSleep is the purist's Apple Watch sleep tracker. It tracks automatically — no buttons, no "I'm going to bed" — and it is detailed and accurate, with a devoted following among Apple Watch owners. Best of all, it is a one-time purchase: a few dollars, once, with no subscription at all, which in a category full of recurring fees is rare.
Where it falls short
It is tracking and nothing else. There is no wind-down content whatsoever — no sounds, no stories — so it does nothing to help you fall asleep, only to measure once you do. It is iOS and Apple Watch only, the interface is dense, and there is no real free tier.
Who it is for
Choose AutoSleep if you own an Apple Watch, you only want data, and you are tired of subscriptions. If you want help getting to sleep, or you are on Android, it is the wrong app.