BLEduino app for iPhone and iPad
The BLEduino companion app pairs with the BLEduino, a tiny Arduino-Compatible development board with Bluetooth 4.0, a.k.a. Bluetooth Low Energy (BLE), built in. The BLEduino makes it easy to control anything from your phone or tablet via bluetooth.
The BLEduino companion app allows you to communicate and control your BLEduino via “modules” within the app. Each module represents a discrete functionality you can play with and is accompanied by a matching Arduino sketch.