icTrainer (Indoor Cycling App)

The discounter among indoor cycling apps.
For cycling, rowing, kayaking, swimming ergometers and treadmills.
Lots of live data (power, heart rate, cadence, left/right balance, core body temperature).
Real routes, workouts, GPX upload, own workouts.
Integrated video chat solution for group training.
Free music to match the cadence of a workout.
Two users can train in parallel on one computer.
Integrated web browser for streaming movies.
Can also be used offline.
Limited free use is possible. A free trial month is available in the app.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Data Protection: https://ictrainer.de/en/data-protection/

This version is only for older MacOS version 10.x.
User with MacOS >=11.0 should use the "icTrainer (Indoor Cycling App)"-Version (Universal Binaries/BT): 
https://itunes.apple.com/de/app/ictrainer/id1453179272