https://catima.app

Tonight I bring you this gem. An offline app that is basically a QR/barcode collector with a slick UI.

This baby can replace so many useless proprietary spyware "store apps" on your phone and useless cards in your wallet.

No, you won't get in trouble for not using "the oficial app" when you present your cards or tickets. All they want is to scan the qr or bar code.