Cyclotron25
Navigation
Only for iPhone
Free
iPhone
Mount your phone on the handlebar and ride. Speed, distance, route and history, measured on your phone, stored on your phone, and never uploaded anywhere.
Cyclotron turns the phone on your handlebar into a bike computer.
Big, legible speed at arm's length in daylight. Your route drawn as you ride. Every finished ride kept on the phone, so you can look back at it or ride against it.
LIVE SPEED
A Kalman filter fuses GPS with the motion sensor, so the dial moves within about two seconds of setting off instead of waiting for a satellite fix and drops back to zero just as quickly when you stop.
RIDE STATS
Distance, ride time, elapsed time, average and maximum speed, and metres climbed. All live, all on one screen. Tap anywhere to swap the map for the full set of numbers.
ROUTE MAP
Apple Maps rendered greyscale with your route behind you, and a follow mode that hands control back on its own after you pan. In landscape the map fills the right half of the screen.
GHOST RIDES
Pick any saved ride with a recorded route and it replays alongside you on the map, so you can see whether you're ahead of the last time you rode it.
HISTORY
Finished rides are kept on the phone, each with its route, full stats, and a chart of speed and elevation over time.
AUTO-PAUSE
Off by default, so your average covers the whole outing door to door. Switch it on and the ride pauses itself at traffic lights, the way a bike computer reports it.
BUILT FOR THE HANDLEBAR
A strictly monochrome face, contrast alone carries the hierarchy, which is what keeps it readable in direct sun. Recording continues with the screen off, and the screen stays awake while you ride with it on.
PRIVATE BY DESIGN
No account. No network calls. No analytics. Cyclotron has no networking code at all, your rides are measured on the phone, stored on the phone, and never uploaded anywhere.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Abel Vincze, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Abel Vincze
- Size
- 885.8 KB
- Category
- Navigation
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Abel Vincze