The (limited time) free CardStar app replaces keychain tags and wallet-cluttering bonus/discount/rewards/”shopper’s club” cards with scanner-friendly barcodes.

If you’ve got the guts to flash a phone instead of swipe your plastic, it could be a real space (and trouble) saver.

There have been many manual scan-and-save tactics to slim down your wallet posted for use with an iPhone, but CardStar’s app takes the scanning out of the equation. It has pre-loaded logos for a wide variety of national and regional stores, but can create a scan-able “card” for any store. Simply create a new entry, name it, and punch in the numbers just below or above the barcode from your bonus card, and CardStar does the rest, creating an alphabetical list of stores when you open it up.

There are advanced options that let you customize the barcode style and even reverse the number order, but most of us are going to get by fine with just tapping in a few numbers.

CardStar is free for a limited time in the iTunes app store, normally costs $.99 (which is almost free anyway), and requires an iPhone running 2.0 or higher firmware.