Snapshot from the "signature page"

Squareup by Square is an iPhone/iPad and Android mobile credit card payment service that uses a small and inexpensive physical reader (aka credit card machine) that plugs into the audio jack of an iPhone or iPad. This page brings together the latest news, reviews, blog posts,Twitter tweets, and videos about the new SquareUp service widely released on May 11th for both iPhone and Android operating systems.

Mobile payment services are growing in popularity as smartphones, particularly the iPhone, extend the geographical range where transactions can take place. SquareUp is envisioned for mobile merchants such as artisans in a street fair or a person-to-person transaction (e.g., Craig’s List). An Android model is expected. See it in action below or visit them online at https://squareup.com.