Square has launched the Register API for Android only a couple of months after releasing the API for iOS. The API allows developers to build end to end point-of-sale solutions that utilize Square's entire payment platform, or that integrate with third party infrastructure and applications.
How can developers make money? That’s a big question in the mobile app space, and the answer is changing. There has been a gradual recognition over the past few years that one-time payment for apps (those “paid apps” that we avoid downloading if we can) is not the happy-face solution for most developers aiming to be compensated adequately for the creative work they do.