RoadFitter: Live Bike Fit
Saddle Height & Knee Angle
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Knee plumb on your own photo: see whether your saddle needs to move forward or back. Plus live fitting with a voice coach as you pedal. No subscription, no cloud.
Your bike fit — live, voice-guided, on your own bike.
RoadFitter draws your skeleton LIVE over the camera image and coaches you through your fit with voice guidance — while you sit on your bike and pedal. No uploads, no waiting, no subscription.
HOW IT WORKS
• Prop up your phone side-on, get on your bike, start pedaling
• The voice guides you: calibration, measurement, results
• Knee, torso, shoulder and elbow angles — measured live across ~30 pedal strokes, never a single snapshot
• Clear recommendation (e.g. "raise saddle ~10 mm"), then re-test instantly: before/after to the degree
THREE MODES
• Live Fit: guided fitting with a voice coach — our core feature
• Manual Measurement: all angles in real time while you adjust your bike
• Video Scan: record a short clip, full analysis of every pedal stroke
FOR EVERY BIKE
Road (aero & endurance), gravel, TT/triathlon, city, step-through, spin — and kids' bikes with a safety-first approach.
HONEST & PRIVATE
• The knee angle is the only scientifically validated, injury-relevant value — and that's exactly what we tell you. Everything else is guidance based on comfort and riding style.
• Angle targets apply regardless of gender (current evidence).
• Your measurements and videos stay on your iPhone. No cloud, no account.
• No black box: your angles are pure geometry — transparent math, not AI hype.
A professional bike fit costs $150–400. RoadFitter brings the key adjustments home — as often as you like, for all your bikes.
Note: RoadFitter is not a medical device and does not replace a professional bike fit or medical advice. If you're in pain, see a professional.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Emil Deak, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Emil Deak
- Size
- 10.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and German
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- RoadFitter Pro $34.99
- Copyright
- © 2026 Holzbucht