ArduiunoDroid

You can now develop for Arduino directly from Android using the ArduinoDroid app, released on Friday onto the Google Play store. The app allows you to develop, compile and upload¹ sketches to your Arduino board directly from your Android phone or tablet. The app is free to download, but displays ads. The ads can be removed with a $2.99 in-app purchase.

¹Sketch upload is only supported for the Arduino Uno and other FTDI based boards. Android devices with USB-host support are required.