Hi Kees - the app is, as you say, just a remote control for the windows phone. It's only the first beta release but the intention was to be able to controll all your speakers from one device. We'd like to extend it's features as much as we can so please do provide feedback. We're limited in what we can do as streaming services such as Spotify and Deezer do not support connecting to the SoundTouch from a Windows Phone.
However, we are looking at improving on the beta where we can. Things like album artwork, currentl playing info, volume slider, timers, Wake Up feature etc. But we need you guys to let us know what you want (and we'll let you know if we can!)
Kind regards
Ben
Agile Tea