Terms of Use

SwingDiff

Last updated: May 23, 2026

These Terms of Use ("Terms") set forth the conditions for using the iOS and Android application "SwingDiff" (the "App"), provided by 10HALF LLC ("we", "us", "our"). Please read these Terms carefully before using the App. By using the App, you are deemed to have agreed to these Terms.

1. Description of the App

SwingDiff is a golf swing analysis application that records and analyzes the user's swing on their device. It detects skeletal keypoints, identifies swing phases (Address, Top, Impact, Follow-through), compares swings against the user's own past swings or a reference model, and produces rule-based diagnostic scores.

2. On-Device Processing

All swing videos, images, extracted skeletal data, phase detection results, and diagnostic scores are processed and stored entirely on your device. We do not collect or receive this content. See our Privacy Policy for details.

3. Eligibility

The App is available to anyone who can operate a supported smartphone. Basic features are available for free; some features require a Pro subscription or a one-time purchase. Users under the age of 13 must obtain parental consent before using the App.

4. Pro Plan (Paid Features)

The App offers paid features ("Pro") through in-app purchase on the Apple App Store (iOS) or Google Play (Android).

• Monthly Plan: Automatically renews every month from the date of purchase.
• Yearly Plan: Automatically renews every year from the date of purchase.
• Lifetime Plan: A single one-time purchase grants permanent access without recurring charges.

Auto-renewal of monthly and yearly plans can be canceled through your Apple ID settings (iOS) or the Google Play subscription management screen (Android) at least 24 hours before the current period ends. After cancellation, Pro features remain available until the end of the paid period.

Refunds are subject to the refund policy of the respective platform (Apple App Store or Google Play). Deleting the App or its data does not cancel any active subscription; please cancel through the platform's subscription management screen.

5. Account and Data Management

The App does not require account registration or sign-in. Purchase entitlements are managed by the platform (Apple App Store or Google Play) and can be restored on new devices using the same Apple ID or Google account.

Because all in-app data is stored on your device, deleting the App will permanently remove analysis history, in-app data, and settings. Please back up any important data before uninstalling.

6. User Content and Responsibility

You are solely responsible for the swing videos and images you record or import into the App. When recording, you must:

• Obtain consent from any other person who appears in the recording before capturing or analyzing their image.
• Comply with all applicable laws, including local laws regarding recording in public or private spaces.
• Respect the rights of third parties, including privacy and portrait rights.

We do not access, monitor, or process any of your recordings, as they remain on your device.

7. Prohibited Actions

Users must not engage in any of the following:

• Disassembling, decompiling, or reverse engineering the App, except as permitted by applicable law.
• Using the App for illegal activities or activities that violate public order and morals.
• Recording or analyzing other individuals without their consent.
• Using the App for commercial purposes (such as paid coaching content production) without our prior consent.
• Interfering with the operation of the App or attempting to circumvent in-app purchase mechanisms.

8. Intellectual Property

All copyrights, trademarks, and other intellectual property rights related to the App belong to us or their rightful owners. Reference swing data ("model swings") bundled with the App is provided for personal, non-commercial reference purposes only. Open-source components used by the App are governed by their respective licenses.

Swing recordings you create remain your own. We claim no ownership over your content.

9. Advertising

The free tier of the App may display advertisements served by third-party advertising networks (such as Google AdMob). These networks may use device identifiers in accordance with the platform's privacy controls. The Pro plan removes advertisements.

10. Disclaimer

Diagnostic scores, phase detections, and comparison results provided by the App are generated using rule-based algorithms and are for reference only. They do not constitute professional coaching advice, medical advice, or any guarantee of swing improvement, athletic performance, or injury prevention. Always consult a qualified instructor or medical professional as appropriate.

We do not guarantee that the App will operate uninterrupted or error-free on every device or operating system version. To the extent permitted by law, we are not liable for any direct, indirect, incidental, or consequential damages arising from the use or inability to use the App.

11. Changes to or Termination of the App

We may change or terminate the App, or any of its features, without prior notice. We are not liable for any damages arising from such changes or termination.

12. Changes to These Terms

We may modify these Terms as necessary. Modified Terms take effect when posted on this page. Continued use of the App after such modification constitutes acceptance of the modified Terms.

13. Governing Law and Jurisdiction

These Terms are governed by the laws of Japan. Any disputes related to the App shall be subject to the exclusive jurisdiction of the court having jurisdiction over the location of our head office.

14. Disclosure Under the Specified Commercial Transactions Act

For the disclosure required under the Japanese Specified Commercial Transactions Act regarding paid plan sales, please see here.