GiftCarder

* Works with any cards that have QR codes. (Each card must have a unique QR code.)
* Simple and fast -- Scan a card, and then add to or subtract from the balance by the keypad.
* Ideal for small food and beverage businesses, kiosks, daily or weekly promotions, punch-style loyalty cards.
* Saves balances on the device -- no need for an internet hookup.

Future improvements

* Set units, like "dollars", "punches", "drinks", "visits"
* Barcode reader
* Check card balances, send to email, back up data
* You tell us :)

Works best on devices with larger screens.