FitLens — AI Exercise Tracker
FitLens is a free, browser-based AI exercise tracker that counts your workout reps in real time using your webcam. Powered by TensorFlow.js MoveNet pose detection, it works entirely in your browser — no app install, no account, no data sent to any server.
Supported Exercises
- Push-ups — elbow angle tracking
- Bicep Curls — arm curl detection
- Shoulder Press — overhead press tracking
- Sit-ups — torso angle analysis
- Crunches — upper body curl detection
- Plank — hold timer with form detection
- Squats — knee angle tracking
- Lunges — front knee bend detection
- Deadlifts — hip hinge angle analysis
- Wall Sit — hold timer with squat detection
- Jumping Jacks — arm spread tracking
- High Knees — knee raise detection
How It Works
FitLens uses the MoveNet SinglePose Lightning model to detect 17 body keypoints at roughly 10 frames per second. Joint angles are calculated in real time, and a debounced state machine counts each complete rep. Session data including reps, time, and estimated calories is saved locally in your browser.
JavaScript is required to use FitLens.