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.
What you get
Live metrics, zone tracking, and session export when you need it.
How it works
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Open the app
Go to app.ritmosync.com in Chrome or Edge, or install the Mac app from this site when available.
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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 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. With Pro, sessions are saved locally—export CSV or FIT anytime from training history.
Your data stays local
RitmoSync is built for privacy-first training.
- Workouts, programs, and settings are stored on your device—not on our servers.
- No cloud sync or account is required for the free app.
- Use Download my data in the app menu to export everything as JSON whenever you want.
- 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
Custom workout builder
Create and save your own interval programs (Pro).
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Planned
More trainer profiles
Broader FTMS and power-meter compatibility testing and fixes.
Community & support
RitmoSync is in active development. Report bugs, request features, or share feedback—we read every message.
Include your browser or app version and trainer model when reporting connection issues.
RitmoSync Pro
One-time license · no subscription
Unlock training history, custom programs, and FIT export.
- Full training history stored locally
- Custom workout programs
- Export sessions as FIT for Strava, TrainingPeaks, etc.
Purchase and license delivery via our checkout provider. See Terms of Service.