Terms of Use

Atelier

Last updated: November 8, 2026

These Terms of Use ("Terms") set out the conditions for using the iOS app Atelier ("the App") provided by 10HALF LLC ("we", "us"). Please read them before using the App. By using the App, you agree to these Terms.

1. The Service

Atelier shows a mechanical watch movement and its complications running from the mechanism itself, its gears and escapement. The watch in the App is for enjoyment and learning; we do not guarantee that it keeps accurate time.

2. Eligibility

The App is free to download and use. Some features (modules and Build Now) require an in-app purchase. Users under 13 should use the App with a parent's or guardian's consent.

3. In-App Purchases

Paid features are offered through Apple App Store in-app purchases. All of them are one-time purchases (non-consumable); there are no auto-renewing subscriptions. Prices are as shown on the App Store.

With the same Apple ID, you can recover your purchases on a new device through Restore Purchases. Refunds follow the Apple App Store refund policy.

4. Your Data

The App needs no account or sign-in. Its data is stored on your device, so deleting the App deletes the assembly progress, the Logbook and the settings. See the Privacy Policy.

5. Prohibited Conduct

You must not:

• Disassemble, decompile or reverse engineer the App, except as permitted by applicable law
• Use the App for any illegal purpose or in a way contrary to public order and morals
• Interfere with the operation of the App or try to circumvent its in-app purchases

6. Intellectual Property

Copyrights, trademarks and other intellectual property rights in the App belong to us or their rightful owners. Open-source components used in the App are subject to their own licenses.

7. Disclaimer

We do not guarantee that the App will run without interruption or error on every device and OS version. To the extent permitted by law, we are not liable for any direct, indirect, incidental or consequential damages arising from the use of, or inability to use, the App.

8. Changes to or Discontinuation of the Service

We may change or discontinue the App or its features without prior notice. We are not liable for any damages this causes.

9. Changes to These Terms

We may change these Terms as needed. Changes take effect when posted on this page. By continuing to use the App after a change, you agree to the revised Terms.

10. Governing Law and Jurisdiction

These Terms are governed by the laws of Japan. The court having jurisdiction over our location shall have exclusive jurisdiction over any dispute relating to the App.

11. Legal Notice (Specified Commercial Transactions Act)

The notice for paid features under Japan's Act on Specified Commercial Transactions is available here (Japanese).