BikeFit AI - Bike Fit Analyzer

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.