Multi vs Joint Angle Camera

All basic features are available for free! Perfect for coaches, athletes, and anyone who needs to measure multiple times simultaneously! As a runner myself, I created this app from the perspective of athletes and team managers who want precise and flexible timing tools. A multi stopwatch and interval timer for team managers, race timing, training, games, business time tracking, and anyone who needs to time multiple people or events at once. Built for track & field, swimming, cycling, motorsport, fitness training, games, work-from-home billing, and everyday timing. Record lap and split times, manage multiple stopwatches, save results, and review past sessions in the calendar. ■Stopwatch Features Run 20+ stopwatches simultaneously (device-dependent) Record lap and split times for multiple people or lanes Save and review data with a built-in calendar view Copy or export timing results for Excel and Google Sheets No-look lap timing for fast-moving races where you cannot keep watching the screen Useful for track & field, swimming, cycling, motorsport timing, games, events, and business workflows ■Video-Synced Timing (Premium Feature) Sync stopwatch time with video playback: slow motion, fast-forward, or pause Measure finishes and lap times more accurately Review sprint finishes, swimming touches, race moments, or close results frame by frame Easily record multiple athletes' lap times by pausing the video and logging times ■Interval Timer Supports up to 99 repeats and 5 customizable intervals Set sound alerts, vibration, and background operation Perfect for Tabata, HIIT, circuit training, study sessions, cooking, and daily routines ■Recommended For Track & field coaches and team managers Swimming coaches and lane timers Runners, swimmers, cyclists, and athletes PE teachers and fitness trainers Cycling, motorsport, keirin, and other race timing Games, events, billing, business tasks, and any situation that needs multiple timers How to Use Switching Modes: Swipe horizontally to toggle between Stopwatch and Timer. ■Stopwatch Tap START, STOP, LAP, or RESET as needed Save data via the bottom-left data icon -> Save -> add a title Tap the stopwatch screen to rename players or lanes View saved data: tap Data -> Calendar -> select a marked day -> choose a title and name ■Timer Add up to 5 intervals by tapping the "+" button Set repeat count by tapping the repeat icon Tap the sound icon to toggle sound or vibration Countdown begins automatically when the timer starts Reset any time with the RESET button Sound Effects: Courtesy of OtoLogic

Joint Angle Camera uses your phone’s camera to estimate joint angles on the device, so you can check your movement during fitness, stretching, and teaching demos. Follow the on-screen guide, move through your range, and see a live pose overlay with approximate angles. This app is not a medical device. It does not diagnose or treat any condition and does not replace a professional evaluation. Angles are estimates and may be wrong. Use them only for everyday fitness and self-tracking—not for medical decisions. WHAT YOU CAN DO • Live pose overlay: keypoints and skeleton on the camera preview with approximate angle readouts • Eight body regions: neck, shoulder, elbow, wrist, waist, hip, knee, and ankle—each with focused movement modes (for example nodding, side tilt, arm raises, and knee bends) • Positioning guides: front or side facing cues and a silhouette to help you line up • Peak hold: keeps the highest estimated angle from a movement so you can compare sessions • On-device history: filter by region, movement, and side; edit pose snapshots; share a single-session PDF • Pro: mobility trend charts and session video with skeleton and angle overlays • Screenshots: save annotated preview frames to Photos • Privacy first: pose and angle processing runs on your device—no account, no upload of camera feed or biometrics FREE VS PRO Free: unlimited real-time neck and elbow estimates with positioning guidance, history, single-record PDF share, and the full notice & privacy policy. Pro regions (shoulder, waist, hip, knee, ankle, wrist): 10 free trials each; one-time purchase unlocks all Pro regions plus trend charts and overlay video. Billed through the App Store. TIPS • Use good light and a clear background; fitted clothing helps tracking • Readings depend on stance, occlusion, and image quality and may be inaccurate • Stop immediately if you feel pain or discomfort IMPORTANT This app is not a medical device and is not medical advice, diagnosis, or treatment. All angles are on-device estimates for fitness, stretching, and teaching only. Do not use them for medical decisions. Available in English and Chinese (Simplified); switch language in the app.