JustSwing
No ball. No club. No range. Prop your phone anywhere you have room to turn and see every swing in slow motion — sectioned, measured, and compared while you keep swinging.
Free · works in your browser · everything stays on your phone
How it works
Prop the phone
Lean it against anything — your bag, a bench, a water bottle. A few steps back, about waist height.
Take your stance
Club, umbrella, or empty hands. Hold still for a second — the screen turns green and beeps. That's your go.
Swing away
The slow-motion replay appears on its own — sectioned, zoomed, measured. Keep swinging; it keeps up.
Your swing, in six sections
Everything is anchored to your setup — a crosshair at your chest — and every swing is split where your hands cross it. Loop any section by itself, on every swing you make.
Everything it does
Hands-free capture
Prop your phone, take your stance, and swing when the screen goes green and beeps. Every swing is detected, recorded, and replayed — no taps, no timers, nobody holding the camera.
Six-section replays
Each swing is automatically split into its six sections. Tap S2 and watch just your move to the top, looped in slow motion with auto-zoom, swing after swing.
Frozen setup guides
Your setup becomes the reference: a crosshair at your chest plus your original shoulder, hip, knee, and spine lines stay pinned on screen, so you can see exactly what moved.
Turn and posture curves
How your shoulders, hips, and spine move through the swing, drawn as curves against your setup. Pick a section and the chart zooms with it.
Swing goals
Checked on every swing: did your hips start the downswing before your shoulders, and did you hold your posture to the strike? Green or red, with the number.
Side-by-side compare
Turn the phone sideways and every new swing plays next to your previous one — or lock your best and swing against it. Passes start together, section against section.
Your on-device library
Every swing saved on your phone with a poster grid — replay, compare, download, or delete. No account needed.
Cloud favorites
Sign in and star the swings worth keeping. They upload privately to your account with full replay data, reviewable from any device.
Practice mode
Rehearsals, takeaway drills, slow-motion moves — practice mode captures any deliberate motion, no full swing required, with a live trail of your hands' arc.
Video import
Got a swing filmed somewhere else? Import the video and it gets the same treatment — sections, slow-motion replay, curves, and goals.
For every golfer
Just starting
You want to see what your swing actually looks like.
- ✓Three-step setup — prop the phone, take your stance, swing on the beep
- ✓Automatic slow-motion replay after every swing, zoomed on you
- ✓Learn the six sections of the swing by watching yours
- ✓Nothing to configure, nothing to buy, no account needed
Putting in work
You have a swing thought and want honest feedback on every rep.
- ✓Park on one section and see it swing after swing — sticky across every rep
- ✓Setup guides show drift from your address: tilt, bend, sway
- ✓Landscape side-by-side against your last swing or your locked best
- ✓Coach checks at each checkpoint, with the measured number
Chasing numbers
You think in sequencing, angles, and milliseconds.
- ✓Hip-vs-shoulder transition timing measured on every swing
- ✓Posture traces that catch you standing up through the strike
- ✓Turn curves for every part of the body, zoomable per section
- ✓Import swings filmed anywhere and run the same analysis
Your swing stays on your phone
Everything happens on your phone — your video is never sent anywhere for analysis. Swings live in your phone's local library, and only the swings you explicitly star as favorites are uploaded, privately, to your own account. No ads, no tracking, no selling your slice to anyone.
Waiting on a train? That umbrella is a 7-iron.
Every spare minute is a practice session. Open it on your phone, prop it up, and swing. Tip: use "Add to Home Screen" and it feels like a native app.