Anyone who said "screw it, I'm dropping $2,000 on an exercise bike" over the past few years would probably like to know which tracker can best log their cycling data. If you already have an indoor bike, check to see which watches or software the bike is compatible with. For instance, the Peloton bike features Apple GymKit integration for Apple Watches and can also be synced with a Fitbit account. NordicTrack's iFit also offers two-way Apple Watch integration. Most modern trackers and watches are equipped with an accelerometer to accurately measure "distance" on a treadmill.