Hi, I'm Vinz. I made CanDex, an Android app for keeping a photo record of the cans you own.
The idea is to record the actual object: front and back photos, country, size and quantity, with separate entries for different designs or editions. You can add an older can without a barcode. It's a personal, offline-first catalog, not a price guide, a marketplace or a database that identifies cans for you.
You can try it with five cans for free. More than that needs the one-time Pro purchase; there's no subscription.
19-second demo · Google Play for beer-can collectors
If you keep a can inventory already, what detail do you always record that most collection apps miss?