The app provides the user a method to communicate control commands to robots.
It is designed specifically for users of the popular Arduino platform https://blog.arduino.cc/ . Currently estimated to be over 1 million users.
Additional information:
There are no limits to the complexity of robot hardware while keeping the reliable iPad as a controller as simple as possible. This video is a demonstration of what can be done:
https://www.youtube.com/watch?v=stkXBv4hROw