It's free and you don't even need a merchant account!
By Tony Donaldson | November 14, 2011
This is a sample transaction using Square to accept a credit card payment
If you want the simplest, easiest way to accept credit card payments, now you have an option. Square (http://www.squareup.com) offers a free credit card reader for iPhones, iPads, and Android smartphones and tablets. Yes, free. All you need is a smartphone or tablet and a bank account.