Tune in works good. Works with Android Auto, which makes streaming in the car easier (not sure if you have Andoid or Apple), but also it has several good Broncos stations, so I bounce between them at times. Since KOA's Broncos coverage has been pretty slim in recent years, the last few years I was only using Iheart for Orange and Blue.
I did/do have the Fan app installed, but if I remember it runs some extra commercials and reverted back to TuneIn, because it also has Altitude and Mile High Sports.