Sleep Cycle now supports Android Wear OS, this is how it works.
Is the Watch stand alone?
No, not really. You don’t need to engage with your phone at all, as you go to bed and wake up with the Watch. But the analysis will still be done via the phone, so the Wear OS integration will act as a remote.
What's the required Wear OS version?
For this integration to work Wear OS 2 is required. Our integration will work with any modern Wear OS watch, from multiple manufacturers (see https://wearos.google.com/#find-your-watch)
How to install the Sleep Cycle watch app on your smartwatch:
On your watch, open the Google Play store and search for Sleep Cycle and install it there.
Automatic start feature:
The automatic start feature is only available for Galaxy Watch 4 at this point in time.