Does the Schwinn IC4 require an app or paid subscription to use? One of the best things about the Schwinn IC4 is that it can be used with the attached computer only! IC4 does not require an app or paid subscription! With that said, one of my favorite aspects of the Schwinn IC4 is being able to use it with apps like Zwift, Peloton App, Apple Fitness+ and MANY MORE! For many riders though, simply watching TV or staring out a window may provide sufficient entertainment while cycling. #IC4 #Schwinn