Looking for advise. Again. 😇

Is there a FOSS alternative to #Rocketbook and/or #Scribzee for use on an Android / GrapheneOS phone?

I'm still waiting for the announced scanning feature in #Joplin, so I can finally use my Rocketbook without having my data being sent to some unknown server.

What I'd like to have: fast and easy scanning with automatic cropping. I don't mind buying special notebooks or printing pages with borders and icons. If possible, the option to send scanned documents by mail, or just put them in a folder for sync via Nextcloud etc.

What I don't need: any kind of OCR, as my handwriting is pretty much unreadable anyway.

Please help.