IC4Workout is an iPhone app for indoor cycling bikes that speak Bluetooth FTMS, built first for the Schwinn IC4. It surfaces ride data Apple’s Workout app does not read directly from FTMS, especially live power.
The app currently shows power, cadence, speed, heart rate, elapsed workout time, estimated distance, and estimated calories during a ride. Completed rides can be written to Apple Health.
Verified: Schwinn IC4.
Expected but not yet externally confirmed: Bowflex C6 and Schwinn IC8.
The app depends on standard FTMS Indoor Bike Data. Bike support depends on what data each bike actually advertises over Bluetooth.