Cadexa for iPhone
An indoor-cycling coach that controls your smart trainer over Bluetooth FTMS and speaks only when it matters.
Cadexa takeOur own app. Documented here in full, including its limits, because the same team runs this site.
About the Cadexa for iPhone
Cadexa is the training app this site grew out of. It controls any FTMS smart trainer in ERG mode, replays imported GPX and TCX routes as gradient, coaches by voice, reads any Bluetooth heart-rate sensor and syncs to Strava. Everything runs on the phone and works offline. There is no account and no subscription.
Because we build it, we describe it in detail rather than rate it against competitors; see the review for what it does well and where it falls short.
Specifications
Manufacturer claims with their sources. Where Cadexa has measured a value it appears in its own column. Missing values are shown as unknown. Manufacturer page
| Specification | Manufacturer claim | Source |
|---|---|---|
| Other | ||
| Platform | iPhone (iOS). No Android release. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Price Model | Free. No account, no subscription, no in-app purchases. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Trainer Control | Bluetooth FTMS: target power (ERG) and indoor bike simulation (gradient, rolling and wind resistance). | Manufacturercadexa.org Checked 1 Nov 2026 |
| Power And Cadence | FTMS Indoor Bike Data; Bluetooth Cycling Power Service as a read-only fallback. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Heart Rate | Bluetooth Heart Rate Service: chest straps and watch broadcasts. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Ant Plus | no | Manufacturercadexa.org Checked 1 Nov 2026 |
| Workouts | 4 × 4 VO2max, 30/15 intervals, Threshold, Sweet Spot, Zone 2 endurance, Recovery ride, Max heart rate test, free ride; 2 runs and 4 walks coached by heart rate. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Routes | GPX and TCX import; gradient simulation with ramped changes; named climbs; ghost of your best time. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Voice Coaching | Spoken cues, calm or energetic personality, works in the background. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Offline | yes (Strava sync and route import need a connection) | Manufacturercadexa.org Checked 1 Nov 2026 |
| Strava Sync | TCX upload with power, heart rate, cadence; routes with map. | Manufacturercadexa.org Checked 1 Nov 2026 |
| Custom Workouts | no (effort scaling and free ride only) | Manufacturercadexa.org Checked 1 Nov 2026 |
| Version | 1.1 | Manufacturercadexa.org Checked 1 Nov 2026 |
Cadexa coverage
Review
Cadexa app review: a smart trainer coach built around FTMS, by the people who wrote it
A detailed, hands-on account of how Cadexa drives a trainer, coaches a workout and replays a route, written by its developer. Read it as a maker’s walkthrough with the limits spelled out, not as an independent verdict.