I can't speak to the others, but Wahoo does have a fitness app, but if you have an Elemnt or Elemnt Bolt, it will connect and control your smart trainer (targeted watts, resistance, level, erg mode, etc.). It will also allow you to virtually ride any route that you have created in RideWithGPS (for example). None of these are like Zwift or FulGaz where you are in a virtual environment (on TV). I find myself using Zwift less and less and using my Elemnt Bolt more and more while watching something on TV I am interested in, such as GCN or GCN Tech, etc....