For the Android users around who hate Google Wallet because it, like Apple's Passbook, doesn't allow you to just put in any old barcode, there is a delightful app on F-Droid (not on the Google Play Store, unfortunately) called Loyalty Card Keychain ( https://f-droid.org/en/packages/protect.card_locker/ ).
This app allows you to simply enter a number (or scan an existing barcode), choose a barcode type (with lots of options, including Codabar!), and save it. Selecting the entry on the app's main screen shows the generated barcode and does the screen-brightening thing. Also the app opens super fast because presumably it doesn't do anything but, you know, displaying barcodes.
It has only one purpose but it may well be my most favourite app. I've even used it to transfer a barcode from some label in the supermarket to the self-checkout post, where for some reason the supermarket assumed that you use the hand-held self-scanning devices that I also don't like.
EDIT: it seems they want you to use Catima instead these days. Trying it briefly it's similarly simple, and seems to be based on the same codebase.
For Apple, I use Pass4Wallet to generate the ‘cards’- which I can then import into Apple Wallet. It’s inconvenient, but gets the job done and has a great privacy policy.
This app allows you to simply enter a number (or scan an existing barcode), choose a barcode type (with lots of options, including Codabar!), and save it. Selecting the entry on the app's main screen shows the generated barcode and does the screen-brightening thing. Also the app opens super fast because presumably it doesn't do anything but, you know, displaying barcodes.
It has only one purpose but it may well be my most favourite app. I've even used it to transfer a barcode from some label in the supermarket to the self-checkout post, where for some reason the supermarket assumed that you use the hand-held self-scanning devices that I also don't like.
EDIT: it seems they want you to use Catima instead these days. Trying it briefly it's similarly simple, and seems to be based on the same codebase.