JumpSense AI - Pose Counter

Count your jump rope reps automatically — no wearables, no manual tapping, no subscriptions. Just point your iPhone camera at the jumper and JumpSense AI counts every skip in real time using Apple's on-device Vision framework. JumpSense AI is a jump rope counter and form analyzer that turns your iPhone into an AI-powered jump rope coach. Using Apple's built-in body pose detection (VNDetectHumanBodyPoseRequest), it tracks your ankle and hip movement frame-by-frame to count jumps accurately, detect double-unders, and visualize your rhythm — all processed on-device with zero network access. WHY CHOOSE JUMPSENSE AI: • Real-Time AI Jump Counting Point the camera and jump. JumpSense AI detects your body pose every frame and counts each jump instantly. No delayed stats, no manual counting — the count updates live as you jump. • Apple Vision On-Device Pose Detection Powered by Apple's built-in Vision framework — no bundled model, no cloud servers, no internet required. Pose estimation runs entirely on your iPhone for instant, private, offline counting. • Double-Under Detection Automatically flags double-unders by analyzing the time between jumps. Tune the interval threshold to match your speed and the app separates single-unders from double-unders in your stats. • Jump Rate (Jumps Per Minute) Track your intensity in real time. The BPM display shows your current jump rate so you can pace intervals, hit target speeds, and measure fitness progress. • Three Display Modes - Count: big jump count HUD with skeleton overlay (default) - Rhythm: count plus a live signal waveform visualizing each jump - Form: skeleton-only view for posture and form analysis • In-App Video Recording Record your jump session with the skeleton overlay and count HUD baked into the video. Save directly to Photos to review form, share, or track progress. The overlay is perfectly synced to the camera frame — no lag. • Camera-Shake Compensation Built-in hip-baseline tracking filters out camera movement, so the count stays accurate even if the phone is handheld or on a shaky stand. • Adjustable Sensitivity Fine-tune the counter to your style: minimum jump amplitude, signal smoothing, idle sensitivity, double-under interval, and extrema detection window. All settings in-app with live preview. • 60 FPS Support Performance mode targets 60 fps on supported devices for accurate double-under detection at high speeds. Balanced and Power Saver modes drop to 30/15 fps to reduce heat on older devices. • Fully Offline & Private No account. No login. No analytics. No tracking. No data collection. No cloud uploads. All pose detection happens on-device; recorded videos stay in your Photos library. Nothing leaves your iPhone. • One-Time Purchase — No Subscription Unlock everything with a single payment. No recurring fees, no in-app purchases, no hidden costs. IDEAL FOR: - Jump rope fitness and HIIT workouts - Double-under practice for CrossFit and fitness training - Boxing and MMA jump rope warm-ups - School PE classes and jump rope teams - Home workouts without a smart rope or fitness tracker - Anyone who wants accurate jump counting without wearing a device HOW IT WORKS: 1. Open the app and grant camera permission. 2. Stand your iPhone so the camera sees your full body. 3. Start jumping — the count updates live. 4. Tap Reset between sets, or switch display modes. 5. Tap Record to save a video with the overlay baked in. TECHNICAL DETAILS: - Uses Apple's VNDetectHumanBodyPoseRequest (COCO-17 skeleton) — no CoreML model bundled. - Ankle-Y peak/valley detection with EMA smoothing. - Hip-baseline EMA compensates for camera shake. - Supports 15/30/60 fps inference modes. Disclaimer: JumpSense AI is an independent fitness utility, not affiliated with Apple Inc. It uses Apple's publicly available Vision framework for on-device pose estimation. Consult a physician before starting any exercise program.