Terms of Use (HarmonyOS)

Notice: Please read these Terms before use. Tapping “Agree & continue” confirms your agreement. If you disagree, choose “Disagree & exit”; the App will not enter its principal features.

1. Parties and scope

These Terms are between you and Lu Liang (developer brand: Gentleflow). They apply only to the HarmonyOS edition of Ninefold Sudoku (“the App”), bundle name tech.gentleflow.ninefold.

2. Agreement and minors

These Terms take effect when you tap “Agree & continue.” If you disagree, exit and do not use the App. A child under 14 should review and use the App with a parent or guardian; other minors should also use it with appropriate guidance. Guardians should help minors maintain healthy play time.

3. Service and price

The App provides Sudoku levels, learning guides, Hell Mode, statistics, preferences, and related on-device features. The core features are free and the App has no ads.

The App also offers Ninefold Premium as a paid service, with a monthly auto-renewing subscription, a yearly auto-renewing subscription, and a one-time lifetime purchase. Price, billing period, and any trial are those shown live on the in-app purchase page and in the AppGallery cashier; payment, renewal, and subscription management are handled by AppGallery in-app purchase.

Automatic renewal is never pre-ticked or bundled with anything else. You must first tick the box agreeing to the Auto-renewal Service Agreement yourself. The App then shows a separate confirmation listing the subscription, first charge, renewal price, renewal cycle, billing time, and cancellation path, with both an “Agree & pay” option and a “Decline” option. Only “Agree & pay” opens the cashier; “Decline” charges nothing. The lifetime purchase involves no automatic renewal.

Unless you cancel, a subscription renews for the same period and is charged to your HUAWEI ID payment method within 24 hours before the current period ends. You can review or cancel it at any time in the App under Settings › About › Manage automatic renewal, with no ID document required. After cancellation no further charge is made and Premium normally remains available until the end of the period already paid for. The in-app Auto-renewal Service Agreement holds the full terms. Deleting the App does not cancel a subscription.

4. License

Subject to these Terms, we grant you a personal, limited, non-exclusive, non-transferable, non-sublicensable, revocable license to install and use the App on a HarmonyOS device you lawfully own or control for personal, non-commercial purposes. The App is licensed, not sold. All rights not expressly granted are reserved.

5. Acceptable use

Except where law expressly permits, you may not copy, rent, sell, redistribute, sublicense, maliciously modify, disrupt, decompile, disassemble, reverse engineer, bypass security controls, use the App unlawfully, violate another person's rights, compromise a device or network, interfere with another user, or impersonate Gentleflow.

6. Intellectual property

The App's code, interface, artwork, sounds, text, level organization, and Ninefold/九重数独 branding belong to us or our licensors and are protected by law. HarmonyOS, AppGallery, and other third-party marks belong to their respective owners.

7. Privacy

The separate HarmonyOS Privacy Policy explains the App's data practices and can be reviewed at first launch and under Settings › About. You can withdraw privacy consent or reset progress under Settings › Data.

8. Updates and availability

We may update the App for fixes, compatibility, experience, legal, or platform reasons. Some updates may require newer system or device capabilities. Device faults, system limits, force majeure, maintenance, or platform changes may temporarily interrupt the App. Material changes requiring fresh agreement will be prominently presented and not inferred from silence.

9. Local data and backup

Game data is principally on-device. Use HarmonyOS backup options where appropriate. Uninstalling, clearing data, device failure, a system reset, or backup failure may cause data loss. We operate no game-data server and normally cannot restore your local save.

10. Disclaimers and liability

The App is a casual puzzle game, not medical, psychological, examination, or other professional advice, and does not promise a particular cognitive result. To the extent permitted by law, it is provided as available without guarantees beyond mandatory law.

Nothing excludes liability for intent, gross negligence, personal injury, mandatory consumer rights, or liability that law does not permit us to exclude. Any lawfully limitable liability is confined to reasonably foreseeable loss directly caused by our breach.

11. Ending use

You may stop and uninstall at any time. We may discontinue a version or service where legally permitted if these Terms are seriously breached, the App is used unlawfully, or a real safety risk arises. The current App has no account or developer server, so we do not remotely suspend local game records.

12. Huawei and third parties

Huawei is not the provider of the App service under these Terms. AppGallery downloads, updates, Huawei Accounts, and HarmonyOS capabilities may also be governed by the applicable terms between you and Huawei. Mandatory consumer rights remain unaffected.

13. Governing law and disputes

These Terms are governed by the laws of the People's Republic of China, excluding conflict-of-law rules. We will first try to resolve disputes through good-faith discussion; unresolved disputes may be submitted to a court with lawful jurisdiction. Non-waivable consumer protections and dispute rights in your place of residence remain unaffected.

14. Contact

Operator: Lu Liang (Gentleflow)
Email: gentleflowoverseas@gmail.com
App: Ninefold Sudoku for HarmonyOS (tech.gentleflow.ninefold)