Disklavier

FYI: There is a Mark IV Disklavier Controller App available in the Google Play App Store!  I downloaded it and have been testing it out for the past couple of hours. 

You will need to have your phone connected via WiFi to the same network or router your piano is plugged into. (Not the Piano's Wifi network used for the PRC-100.)

The app is still in Beta and currently supports basic functions such as turning the piano on from standby, selecting, searching, playing and pausing songs from the PianoSoft or User Libraries.  You can also adjust the volume and audio balance as well as switch the piano between Quiet and Acoustic modes.

Go to the Google Play App Store and search for "Disklavier". The App is called: Droidklavier.

You will need to know and key in the IP Address of your piano so that you can connect to your piano.  I ended up using the default password on mine.

 -Ken