Cadexa Gear Compatibility

Does your trainer work with Cadexa?

Three honest layers for every function: what the manufacturer declares, what should work on paper, and what the Cadexa team has verified with the app on real hardware. Protocol support alone is never shown as verified.

trainers in the database

with verification records

verified or reported function results

Smart trainer manufacturer

Model

Phone platform

Desired functionality

Power measurementWatts read from the trainer or a power meter.CadencePedalling rate, from the trainer or a crank sensor.Heart rate connectivityA Bluetooth heart-rate strap or watch broadcast.ERG workoutsThe app sets a target power and the trainer holds it.Resistance controlThe app changes trainer resistance during a ride.Route gradient simulationThe trainer follows the gradient of an imported route.

Power measurement

Reported working

Layer 1 · Manufacturer-declared protocol support
Manufacturer declares Bluetooth FTMS.
Declared
Layer 2 · General technical compatibility
Power is read from the FTMS Indoor Bike Data characteristic. Expected to work; see verification.
Expected to work
Layer 3 · Verified with the Cadexa app
Rider report, not reproduced by the Cadexa team yet
Rider report (October 2026): power from the SB20 over Bluetooth FTMS in daily use with Cadexa 1.1. The same rider left a public App Store review on 30 October 2026.
App 1.1 · Tested 30 Oct 2026
Reported working

ERG workouts

Reported working

Layer 1 · Manufacturer-declared protocol support
Manufacturer declares Bluetooth FTMS.
Declared
Layer 2 · General technical compatibility
Control goes through the FTMS control point. Trainers differ in how they implement it, so this stays unverified until tested.
Expected to work
Layer 3 · Verified with the Cadexa app
Rider report, not reproduced by the Cadexa team yet
Rider report (October 2026): ERG workouts hold target power on the SB20 with Cadexa 1.1.
App 1.1 · Tested 30 Oct 2026
Reported working

Route gradient simulation

Reported working

Layer 1 · Manufacturer-declared protocol support
Manufacturer declares Bluetooth FTMS.
Declared
Layer 2 · General technical compatibility
Control goes through the FTMS control point. Trainers differ in how they implement it, so this stays unverified until tested.
Expected to work
Layer 3 · Verified with the Cadexa app
Rider report, not reproduced by the Cadexa team yet
Rider report (October 2026): imported routes ridden in simulation mode on the SB20.
App 1.1 · Tested 30 Oct 2026
Reported working

See the full specification on the StagesBike SB20 product page. Tested a combination we have not? Tell us.

How to read the result

Verified compatible: Tested by the Cadexa team with a stated app version and firmware. Evidence is shown.
Reported working: A rider has reported it working with the app and told us the setup. Useful, but not reproduced by the Cadexa team yet.
Partially compatible: Works with a known limitation, which is stated.
Not compatible: Either verified not to work, or the trainer lacks the protocol the app relies on.
Not yet tested: Nothing verified. Layer 2 tells you whether it is expected to work.

What the app uses

Bluetooth FTMS for trainer control: target power (ERG) and indoor bike simulation (gradient, rolling and wind resistance).
Bluetooth Cycling Power Service as a read-only fallback for power and cadence.
Bluetooth Heart Rate Service for any strap or watch broadcast.
No virtual 3D world or avatars. Routes are ridden as gradient, with the road profile on screen.
Bluetooth only: the app does not use ANT+.
Available for iPhone. No Android release has been published.

Read the FTMS explainer →