Well so far I noticed 2 bugs:

#1: I can start the application only once, if i try to start it a 2nd time it won't activate BT automatically and I can hear nothing at all. Enabling BT manually doesn't helps. It works fine when I restart the phone, but only once.

#2: Frequencies below 87,5 are shown if you change the region, though its not setting the frequency. So you always hear 87,5MHz but none of the lower frequencies even if the display is saying for example 86,0MHz.