DIFF YOUR SWING
Can you repeat
that swing?
Golf is a game of repeatability. SwingDiff analyzes your swing video on-device, then overlays your skeleton against a reference or one of your past swings — so you can diff your way to a more repeatable swing.
Core analysis is free — iOS 16.0+ / Android 9.0+
INDEX — 5 THINGS IT DOES
SKELETON × 4 PHASES
Skeleton × phase detection
On-device AI extracts your skeleton straight from video. Address, Top, Impact, and Follow-through are auto-detected as the four key phases — no manual frame scrubbing.
4 PHASES, AUTO-DETECTED
15-POINT AUTO DIAGNOSIS
15-point auto diagnosis
Spine tilt, axis lean at the top, hand position at impact — 15 repeatability-critical points are graded pass / fail from your skeleton data, with a clear overall score so you know exactly what to work on next.
3 SCORE COLORS
DIFF VS. REFERENCE OR PAST SELF
Diff vs. reference or past self
Overlay your skeleton on a built-in reference swing, or on a previously analyzed swing of your own. Phase by phase you can see where you drift — and that's where repeatability comes from.
CYAN = YOU, GREEN = REFERENCE
YOUR PROGRESS, ON RECORD
Progress tracking
Every analysis is saved to your history. Watch your score trend over time to see whether your practice is paying off — and catch the moment you set a new personal best.
NOTHING LEAVES YOUR PHONE
Your videos never leave your phone.
All analysis runs on your device. Videos, images, and skeleton data are never sent to a server, and no account or sign-in is required.
- No videos, images, or skeleton data uploaded
- No account, no sign-in
- Every analysis runs on-device
PLANS
Start free, go Pro when you need more
Pro is an in-app purchase. Core analysis stays free, forever. Analysis itself always runs on-device, free or Pro — the free version just needs a connection to show ads.
FAQ
Frequently asked questions
Q.Is it free?
Yes — all core analysis features are free. Upgrading to SwingDiff Pro (monthly ¥300 / yearly ¥2,400 / lifetime ¥4,800) removes ads and lets you analyze offline.
Q.What's the best way to shoot?
Record Down-the-Line (DTL) — directly behind your ball flight line — with your phone held vertically. Position the camera so you appear on the left and the ball on the right of the frame. Bright outdoor light, a simple background, and enough distance to capture your full body all help detection accuracy.
Q.Can I use Slo-Mo (120fps / 240fps) video?
Yes. Slow-motion videos shot at 120fps or 240fps load as-is. Analysis is time-based, so results stay accurate regardless of frame rate.
Q.Are my videos sent to a server?
No. Videos, images, and skeleton data never leave your device — everything is processed on your phone. No account is required.
GET SWINGDIFF — FREE
Diff today's swing.
iOS 16.0+ / Android 9.0+ · Core analysis is free
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