Earlier quoted context omitted.
Close to what paypal started as. Then they realized people didn't want to send payments using their PDAs, they wanted to send them via email.
...and obviously paypal was ahead of it's time, and I doubt the execution was as clean or user-friendly as square.
I guess I'm wondering what use-case it's aiming at.
Also I absolutely would not trust someone swiping my card through one of these. I like a closed box that is obviously provided by a bank, which cannot be tampered with. Not an iphone that could be doing anything with my details.