Yes — Bookmote works with Supernote (Ratta).
Arrow-key page turns work in epub and PDF (F10 is the device refresh key — map Refresh to F10). Most other keys have no effect.
Source: Reddit r/Supernote report
Most e-readers put their Bluetooth radio to sleep after a period of inactivity to save battery. If page turns stop responding, tap your e-reader's screen to wake it — Bookmote reconnects automatically once the device is awake.
Bookmote has been confirmed to work with: Apple Books (iOS app), Kindle for iOS (iOS app), Google Play Books (iOS app), Adobe Acrobat (PDF) (iOS app), RIDI (iOS app), Kyobo eBook (iOS app), Millie (iOS app), yes24 (iOS app), Kindle for Android (Android app), Google Play Books (Android) (Android app), Adobe Acrobat (PDF, Android) (Android app), KOReader (Android app), Batcave (comic reader) (Android app).