Being a phablet, the Galaxy Note is handy for apps that might normally work best on larger mobile devices. Square Card Reader, for instance, is a good match for the Galaxy Note, which has a screen that's large enough for processing transactions, and a stylus for your customers to digitally sign their receipts. Square's free credit card reader attaches to the top of the phone. The app is free as well--but Square's credit card processing service is not. Users pay either a flat month rate of $275, or a 2.75% charge per swipe.