It's a wonderful app IMHO. It is much better than fussing with Hoseline. I use it to monitor various DMR talkgroups. If there is a dislike, the audio stops if the app loses focus. I'm not sure if that is an Android OS limitation or not.
On DMR, like using a radio, one must keyin to connect to tg 4000 to disconnect from a talkgroup before changing to another.