Mophie and Intuit have entered the iPhone credit card transaction game with the Complete Card Solution for iPhone. Mophie, known for its iPhone battery pack cases, developed an iPhone 3G/3GS case that includes a magnetic card reader built in. When the card is swiped, data is encrypted before it uploads to the iPhone to be processed by the Intuit GoPayment 3.0 app.
Mophie is working on an iPhone 4 version of the device. In the meantime, Square features a portable card reader that plugs into the headphone jack of any iPhone or iPad. The two competing payment systems have different costs, with Square being completely free to set up. Complete Card Solution is $179 for the card reader unit and requires a $12.95 monthly subscription.