Jump Squat Rep Counter
Stop counting in your head. Point your phone at yourself and every full-range jump squat counts itself — sets, reps, and PRs logged automatically while you train your quads and glutes, with calves and core assisting. Free, in your browser, no account needed.
▶ Start Counting FreeHOW TO DO A PROPER JUMP SQUAT
Setup Face the camera or turn side-on, feet shoulder-width.
- Squat down to parallel.
- Explode up into a jump, driving through your heels.
- Land soft and absorb straight into the next squat.
This is the same instruction sheet you’ll find on the ⓘ panel inside the app — with an animated demo next to it.
HANDS-FREE IN THREE STEPS
Prop your phone and get in frame
Set your phone at roughly torso height and face the camera or set up side-on — both work. The built-in camera test confirms your lighting, distance, and angle with live green checks before you start.
The AI locks a 17-point skeleton on you
GoodReps measures your knee angle (hip → knee → ankle) in real time, entirely on your device. No wearables, no clickers. No equipment — bodyweight and a soft landing.
Just work — the counter does the counting
A rep banks at the bottom (~90°) and re-arms when you return toward ~165°. Half reps don’t count, and after 3 clean reps it calibrates to your personal range of motion.
WHAT MAKES A REP COUNT
- Your knee angle, live — loading from roughly 165° down toward 90° before takeoff. Stiff little hops don't bank; loaded jumps do.
- Your personal range of motion — after 3 clean reps the counter calibrates to your depth and rhythm.
- The drive out of the bottom — the form cue is exactly what a coach would say: "Drive through heels."
COMMON JUMP SQUAT MISTAKES
Skipping the squat
If you don't load the spring, it's just bouncing. Sink to a real squat depth before every takeoff — the camera checks the descent.
Landing loud and locked
The landing is a squat too. Touch down softly, knees tracking over toes, and absorb straight into the next rep.
Knees caving on takeoff
Valgus under speed is worse than valgus under a barbell. Push the floor apart as you jump.
Chasing height over rhythm
Max-height jumps fry you in seconds. Aim for consistent height with a steady beat — that's where the conditioning lives.
PRIVATE BY DESIGN
Pose detection runs in your browser via TensorFlow.js. Camera frames are analyzed in real time and immediately discarded — nothing is recorded, nothing leaves your phone, and we never see them. Sign-in is optional; skip it and everything stays local.
QUESTIONS, ANSWERED
Do I need any equipment for jump squats?
No — bodyweight only. A forgiving surface (wood, turf, a mat) beats concrete for repeated landings.
Does it work in a home gym or low light?
Run the built-in camera test first — it checks your lighting, distance, and angle with live green checks before you start. If a rep still slips through, manual counting is always one tap away.
Is my camera feed uploaded anywhere?
No. Pose detection runs entirely on your phone, in your browser. Frames are analyzed in real time and immediately discarded — nothing is recorded, nothing is uploaded.
RELATED GUIDES
Free forever — camera counting for all 60 exercises, no account needed. Pro (voice coaching, programs, depth-camera form checks) is $7/mo, $49/yr, or $99 once. No ads, ever.