Right Hand Backup
A private tool used by one person, its developer. It is not offered to anyone else.
What it does
It copies encrypted backups of the developer's own Right Hand assistant (a notes vault and an app signing key) to the developer's own Google Drive, and reads them back when restoring.
Data
It touches only the files it created in that Drive. Backups are encrypted before they leave the server. No data is collected, shared, sold or sent to anyone else, and there is no analytics or advertising.
Access
The Google sign-in grants access to the developer's own Drive only. It can be revoked at any time at myaccount.google.com/permissions.
Contact
The developer, at the contact address on the Google consent screen.