Pull-Up Form Check
Is your pull-up actually good? Prop your phone up and find out — GoodReps watches your elbow angle (shoulder → elbow → wrist) live and scores every rep as you train your back and biceps, with shoulders, forearms and core assisting. Free, in your browser, processed entirely on your device.
▶ Check My Form FreeHOW TO DO A PROPER PULL-UP
Setup Hang from a bar facing toward (or away from) the camera, palms facing forward.
- Pull yourself up until your chin clears the bar.
- Drive your elbows down and squeeze your back.
- Lower under control to a full hang.
This is the same instruction sheet you’ll find on the ⓘ panel inside the app — with an animated demo next to it.
THREE STEPS TO A SCORED PULL-UP
Prop your phone and get in frame
Set your phone at roughly torso height and stand facing the camera. 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 elbow angle (shoulder → elbow → wrist) in real time, entirely on your device. No wearables, no sensors. A pull-up bar — a doorframe bar works fine. Bodyweight is the weight.
Move — and watch the form bar
The bar fills as you travel from ~160° toward ~50° at the bottom. Stop short and it tells you; a rep only counts through the full range of motion.
WHAT THE CAMERA WATCHES
- Your elbow angle, live — from roughly 160° at a dead hang up toward 50° at the top. Chin-reaches don't bank; real pulls do.
- Your personal range of motion — after 3 clean reps the counter calibrates to your build and grip.
- The finish up top — fall short and the form cue is the standard: "Chin over bar."
COMMON PULL-UP MISTAKES
Kipping without meaning to
A swing at the bottom is momentum doing your reps. Start each pull from a still hang — quiet legs, braced core.
Chin reaching instead of pulling
Craning your neck over the bar isn't the same as pulling your chest to it. Lead with your chest and let the chin follow.
Half-range at the bottom
Not returning to a full hang keeps your lats on vacation. Straight(ish) arms at the bottom — that's where the next rep starts.
Shoulders up in your ears
Set your shoulder blades down and back before you pull. It protects the joint and connects the pull to your back.
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
What if I can't do a pull-up yet?
Start with dead hangs and slow negatives (jump up, lower down slow) — both build the exact strength you need, and the app tracks your holds too.
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.