Hi,
I made an android app to control your arduino over wifi / web. It has a few buttons that you can give a name and a string to send to the arduino.
the app can be found here: https://play.google.com/store/apps/details?id=com.marquesoft.ArduinoController&feature=search_result.
And the example sketch here: http://db.tt/GMoyi6hg.