Sign in with Apple if you want an account, and nothing at all if you do not — an account is optional, always, and never needed to log a night. Entries are held on the device with SwiftData, so what your nights say about you does not have a copy at our end.
A daily reminder at the hour you choose, a Siri Shortcut for logging a night without opening anything, CSV export whenever you want the record in your own hands, and a week's chart small enough to read before the coffee lands.
Not yet released
iPhone, iOS 18 and later. Nightshift is not released and not priced yet — the figure is published before launch and before anything can be bought. The register is how you hear about both.
1 person is written into the register so far.

