Been using a very cool #FOSS app - Catima - installed via F-Droid - to store all my bar & QR coded cards (library cards!) & Covid Passport. Very handy, and easy to use - recommended! github.com/TheLastProject/Catiโฆ
GitHub - TheLastProject/Catima: Catima, a Loyalty Card & Ticket Manager for Android
Catima, a Loyalty Card & Ticket Manager for Android - GitHub - TheLastProject/Catima: Catima, a Loyalty Card & Ticket Manager for AndroidGitHub