AI Rep Counter (camera workout counter: squats, push-ups, sit-ups)

About the AI Rep Counter (camera workout counter: squats, push-ups, sit-ups)

A rep counter that watches you through your camera and counts squats, push-ups, sit-ups and jumping jacks, set by set. MediaPipe Pose Landmarker finds 33 points of your body in each frame, on your device, and the counter follows one joint angle per exercise — the knee, the elbow, the hip or the shoulder — counting a rep each time you go through the movement and back. A stick figure over the picture shows what the model sees, and a warning tells you when it cannot see your knees, wrists or another part it needs.

Correct the count by hand with +1 and −1, press End set to list the set with its time, let the rest timer run, and count from a video you recorded if you prefer. The picture is never recorded or uploaded, and the counter does not judge your form or give injury advice: it counts. Without a pass the result is a free preview: the live count and the set totals in full and the first half of the set list; saving to the Gym Workout Log, the CSV and copying unlock with a Pro pass.

Common uses

• Home workouts: count push-ups or squats hands-free instead of losing count.
• Daily challenges — 100 squats, 50 push-ups — with the sets and times listed.
• Counting the reps in a video you recorded of your set.
• Adding counted sets to your training history in the Gym Workout Log.

How a rep is counted

Each exercise follows one angle between three body points, measured in the picture, and counts a rep when that angle goes past a turn threshold and back past a start threshold. The thresholds are far apart, the angle is smoothed (the middle of the last three frames, then a moving average), and reps closer together than a person can do them are ignored, so a wobble never counts twice.

• Squats: the knee (hip–knee–ankle): start above 160°, turn below 100° (shallow 120°, deep 85°).
• Push-ups: the elbow (shoulder–elbow–wrist): start above 155°, turn below 100° (shallow 115°, deep 85°), counted only while your shoulders and hips are near level, so bending your arms while standing does not count.
• Sit-ups: the hip (shoulder–hip–knee): start above 115° lying back, turn below 70° sitting up (shallow 85°, deep 55°).
• Jumping jacks: the shoulder (hip–shoulder–wrist): start below 45° with arms down, turn above 135° with arms up (shallow 115°, deep 150°).

These are counting rules, not standards of good form. Choose Shallow under Settings if reps you did are not counted, or Deep to count only fuller ones. When a needed part leaves the picture, the counter waits and says what it cannot see; nothing counts while it is out of view.

Setting up the camera

Angles are measured in the picture, so the joint has to bend across the camera’s view, not towards it: that is why squats, push-ups and sit-ups count best side-on (a diagonal of about 45° works for squats), and jumping jacks from the front.

• Stand about 2–3 m away with your whole body in the picture. The model card of the pose model lists people further than about 4 m (14 ft) from the camera, more than one person in the picture and a head out of view as uses it is not made for.
• Use even light on you rather than a window behind you: poor light, noise and fast motion make the points jitter.
• Prop the camera so it stays still, and keep others out of the picture: the count follows the person who fills most of it.
• Phones: use the back camera for a wider, sharper picture if someone can check the screen, or the front camera to watch yourself (shown as a mirror).

The pose model and your privacy

The counter uses Google’s MediaPipe Pose Landmarker (Lite model, Apache-2.0 licence), whose model card names fitness and repetition counting among its intended uses. The engine and the model are files of this site, downloaded once (about 17.5 MB) and then kept by your browser. Every frame goes from the camera to the model and the stick figure inside this page: no picture or video is stored, recorded or sent anywhere, and nothing about your face is drawn or kept. A video file you choose is played in the page and never uploaded.

Limitations

• It counts and does not assess form: a rep counts when the angle passes the thresholds, however it was done.
• One person at a time; the camera must see the needed body parts side-on or from the front as described.
• Fast reps, loose clothing that hides the joints, poor light or a moving camera can cause missed or extra reps; correct them with +1 and −1.
• Counting pauses when the page is in the background or the screen is off.
• Needs a browser that runs WebAssembly (current Chrome, Edge, Firefox and Safari) and a camera over a secure connection.

Privacy

On this device; its files download once

Camera frames and videos are processed in this page on your device and never leave it; nothing is recorded. The set list stays in the page; Save to workout log keeps the sets in this browser for the Gym Workout Log, and downloads are files you save yourself.