BikeFit AI - Bike Fit Analyzer
Cycling Position Analysis
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Point your phone, pedal for 30 seconds, get instant bike fit feedback. 100% on-device — your videos never leave your iPhone.
Get instant bike fit feedback — no appointment, no equipment, just your iPhone.
BikeFit AI uses Apple's on-device pose estimation to analyze your cycling position from a simple side-view video. Record yourself pedaling on an indoor trainer for 30 seconds, and receive a detailed breakdown of six key biomechanical metrics used by professional bike fitters.
WHAT YOU GET
• Knee Extension & Flexion — assess whether your saddle height supports efficient pedaling
• Hip Angle — evaluate your reach-to-stack ratio and hip flexor comfort
• Back Angle — understand how aggressive or upright your riding position is
• Elbow Angle — check your handlebar reach and vibration absorption
• Ankle Angle (Heel Drop) — see if your foot position is neutral at the bottom of the pedal stroke
Each metric includes a clear traffic-light rating (green, yellow, red), your measured angle in degrees, and the ideal range for your riding style.
HOW IT WORKS
1. Set up your phone at hub height, side-on to your trainer
2. Follow the on-screen guide to frame yourself correctly
3. Pedal steadily for at least 30 seconds
4. Get your results in under 20 seconds
TWO RIDING MODES
• Endurance — relaxed geometry ranges for long-distance comfort
• Performance — tighter ranges for aggressive, race-oriented positioning
UNDERSTAND, DON'T GUESS
Every metric comes with educational context: what was observed, why it matters biomechanically, and what a professional bike fitter might consider. BikeFit AI teaches you about your position — it doesn't prescribe changes.
TRACK YOUR PROGRESS
• Session history with date-stamped results
• Side-by-side comparison of any two sessions
• Shareable report images with annotated key moments
100% PRIVATE
All analysis runs entirely on your device using Apple's Vision framework. Your videos are never uploaded. No internet connection is required. No account needed.
KEY FEATURES
• 6 biomechanical angle measurements
• On-device AI pose detection — works offline
• Video replay with skeleton overlay
• Annotated key-moment snapshots (top & bottom of pedal stroke)
• Standard (fast) and Detailed (precision) analysis modes
• Import existing videos from your photo library
BikeFit AI is an educational tool and is not a substitute for a professional bike fitting. If you experience pain or discomfort, please consult a qualified bike fitter or medical professional.
Ratings & Reviews
The developer, Jonas Friesslich, 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
- Jonas Friesslich
- Size
- 1.9 MB
- Category
- Sports
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Jonas Friesslich Software