SwingDiff
Q. How should I shoot my swing for accurate analysis?
Record from directly behind your ball flight line (Down-the-Line, DTL) with your phone held vertically. Position the camera so that both you and the ball fit in the frame, with the golfer on the left side of the screen and the ball on the right. A simple background and enough distance to capture your full body improve skeleton detection accuracy.
Q. Skeleton detection is not working. What should I try?
Try the following:
Q. Is there a length limit for videos?
Each video must be 15 seconds or shorter. Longer videos cannot be loaded. Please record or trim your videos to fit 1 – 2 swings.
Q. Can I use slow-motion (120fps / 240fps) videos?
Yes. Videos shot in slow-motion mode at 120fps or 240fps — for example with iPhone's Slo-Mo or an Android device's super slow-motion feature — are supported. The App analyzes videos in the time domain, so you get accurate results regardless of frame rate.
Q. How does the comparison with a reference swing work?
SwingDiff overlays your analyzed swing with a built-in reference swing — or one of your own past swings — at each of the four phases: Address, Top, Impact, and Follow-through. By inspecting the per-phase skeleton differences ("diff"), you can identify what to fix to make your swing more repeatable.
Q. I purchased SwingDiff Pro but the features are not unlocked
Open Settings (gear icon) and tap "Restore Purchases". As long as you are signed in with the same Apple ID (iOS) or Google account (Android) that you used for the original purchase, your entitlement will be restored and Pro features will be enabled.
Q. How do I transfer Pro to a new device?
Re-download SwingDiff with the same Apple ID (iOS) or Google account (Android) that you originally purchased with, then tap "Restore Purchases" in Settings. Both subscription plans (monthly / yearly) and the lifetime purchase can be restored this way.
Q. How do I cancel my subscription?
Subscriptions are managed by the platform store, not within the App itself:
After cancellation, Pro features remain available until the end of the current paid period.
Q. How do I disable or change advertising consent (free tier)?
On the free tier (iOS and Android), the App shows advertisements via Google AdMob. In regions that require explicit consent (e.g., the EEA and UK), a Google UMP consent form is shown on first launch. On iOS, an App Tracking Transparency prompt is also shown. You can review or change your consent and tracking settings at any time from the App's Settings or your device settings. To remove advertising entirely, upgrade to the Pro plan.
Q. Where is my data stored?
All swing videos, skeleton data, analysis results, and settings are stored on your device. Nothing is sent to a server operated by us. Deleting the App permanently removes this data. See the Privacy Policy for details.
Q. Does it work offline?
On the free tier, an ad is shown before each analysis, so running an analysis requires an internet connection. With SwingDiff Pro there are no ads, and you can analyze fully offline. Note that skeleton detection, phase detection, and diagnosis themselves all run on-device — your videos and skeleton data are never sent to a server.
Q. Which OS versions are supported?
iOS 16.0 or later, and Android 9.0 (API level 28) or later.