Train with power on your indoor bike
RitmoSync connects to your smart trainer over Bluetooth FTMS, shows live power and zones, and runs structured workouts—all in the browser or as a Mac app.
Use the web app in Chrome or Edge (Web Bluetooth), or install the Mac desktop app for a dedicated window. No account required for the free tier.
Web Bluetooth requires Chrome or Edge on desktop. Not supported in Safari or most mobile browsers. Mac app requires Apple Silicon (M1 or later).
What you get
View live metrics and zone tracking for free. Pro unlocks custom programs, saved history, and CSV/FIT export.
Live power & zones
Training history & FIT export
Custom workout builder
How it works
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Open the app
Go to app.ritmosync.com in Chrome or Edge, or download the Mac app and open the DMG to install.
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Connect your trainer
Pair your FTMS-compatible smart trainer or power meter via Bluetooth. RitmoSync reads power, cadence, and speed from the device.
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Set FTP and pick a workout
Enter your FTP in the menu to calibrate zones. Choose a built-in program, build your own intervals (Pro), or follow open riding. Need FTP? See our 20-minute test guide.
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Ride and review
Watch live zones and session stats as you ride—the free tier shows metrics on screen only. With Pro, sessions are saved locally and you can export CSV or FIT from training history.
Your data stays local
RitmoSync is built for privacy-first training.
- App settings stay on your device—not on our servers. Pro workouts and custom programs are stored locally too.
- No cloud sync or account is required for the free app.
- Use Download my data in the app menu to export settings and local app data as JSON.
- Pro license validation calls our license API only to verify your key; it does not upload ride history.
Roadmap
What we are working on next.
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In progress
Windows desktop app
Native installer for Windows alongside the existing Mac build.
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Planned
Heart rate monitor support
Pair a Bluetooth heart rate strap and track HR alongside power and zones.
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Planned
Treadmill support
Connect FTMS treadmills for indoor running with pace and incline metrics.
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Planned
More trainer profiles
Broader FTMS and power-meter compatibility testing and fixes.
RitmoSync Pro
$39.90 One-time license · no subscription
Unlock training history, custom programs, and session export.
- Full training history stored locally
- Custom workout programs
- Export session metrics as CSV or FIT for Strava, TrainingPeaks, etc.
Purchase and license delivery via our checkout provider. See Terms of Service.