Hi! Downloaded the app yesterday, and I must confess I am a bit diappointed. On my iPhone 5 it works, but it's really slow and, well...not very nice to look at. Sorry, but that's my opinion.
I also downloaded the iWDLive-app. This is a bit better, but I really miss being able to have more than one station active at a time. As it is now you have to go through a long list every time you want to change stations.
The best iWDL-based app I have found so far is actually one I've had installed for quite a while. It looks good and has the option to have more stations configured at a time. It's called Sol Tiempo, and it's in the app store. I'm in no way affiliated with the author.