The free Haken Mobile App allows you to control your Haken Continuum or any other Haken Audio instrument now with your mobile device. 

+ Haken Audio now includes a 3D-printed phone holder with every new Slim Continuum, starting with the next Slim21 shipment.
The holder gives your phone a secure spot at the instrument, which is handy with the Haken Mobile App.

Already own a Continuum?
Haken Audio has made the source files freely available, so owners can print the holder at home or have a local 3D printing shop do it. The STL files are available at hakenaudio.com/stldiy.

The page also offers other user-printable accessories:

Mobile Phone Holder
Continuum - Osmose49 Bracket 
Tri-Octave Pedal Tray 
Warbl Finger Guide 
Warbl/Micro/uHost Stand