Gridz User Agreement
Welcome to Gridz, a lightweight Sudoku game application developed for iOS devices. By downloading, installing, or using the App, you acknowledge that you have read, understood, and agreed to be bound by the terms and conditions of this User Agreement. If you do not agree to any part of these terms, please do not use the App.
1. Scope of Use
1.1 The App is provided for personal, non-commercial use only. You may use the App on your own iOS devices in accordance with these terms and applicable laws and regulations.
1.2 You are responsible for ensuring that your use of the App complies with the laws, regulations, and public order of the region where you are located. You shall not use the App for any illegal, harmful, or infringing activities.
2. Core Functions and Usage Rules
2.1 The App provides Sudoku game functions with three difficulty levels (Easy, Medium, Hard) and two background customization options (copyright-free built-in templates and local image uploads). You can use these functions free of charge, and no account registration is required. It is important to note that the App does not collect, store, or process any facial information or biometric data of any kind from you at any time.
2.2 When using the local image upload function to customize the background, you shall ensure that the uploaded images are legally owned by you or that you have obtained sufficient authorization from the copyright owner. You shall bear all legal responsibilities arising from the infringement of third-party rights (including but not limited to copyright, portrait right, and privacy right) caused by the uploaded images.
2.3 The built-in background templates provided by the App are sourced from legitimate royalty-free image platforms (e.g., Unsplash) and are only for your use within the App. You shall not extract, copy, or distribute these templates for any purpose outside the App without authorization.
2.4 You shall properly use the App's game functions and shall not use any third-party plug-ins, cheats, or other improper means to modify the game data, interfere with the game operation, or gain unfair game advantages. Such behaviors will be deemed as a violation of this Agreement, and we reserve the right to restrict your use of the App.
3. Intellectual Property Rights
3.1 All intellectual property rights of the App (including but not limited to software code, interface design, logo, text description, built-in templates, and game rules) belong to us or our authorized licensors. These intellectual property rights are protected by applicable intellectual property laws and international treaties.
3.2 Without our prior written permission, you shall not copy, modify, adapt, translate, decompile, reverse engineer, disassemble, or attempt to obtain the source code of the App in any way. You shall not rent, lease, lend, or distribute the App or any part of its content to third parties.
3.3 The intellectual property rights of the images you upload when using the App belong to you or the legitimate copyright owner. By uploading the images to the App, you grant us a non-exclusive, non-transferable, and free license to use these images within the scope necessary to provide the background customization function (e.g., displaying the images in the game interface). This license will automatically terminate when you uninstall the App or delete the uploaded images.
4. Data Storage and Management
4.1 All data generated by your use of the App (including but not limited to game progress, game records, and uploaded background images) is stored locally on your iOS device. We do not collect, store, or process this data on external servers, and we have no right to access or control this data. Additionally, the App does not collect any facial recognition data, facial features, or other biometric information related to your face, and we will never request access to such information.
4.2 You have full control over the local data of the App. You can delete the game records through the "Clear Records" function in the App. Uninstalling the App will automatically delete all local data related to the App from your device. We shall not be liable for any data loss caused by your improper operation, device failure, or other reasons.
5. Permissions and Related Instructions
5.1 When you use the local image upload function for the first time, the App will request access to your device's photo library. This permission is optional—you can choose to decline it, and you can still use the App normally with the built-in background templates. The App will never request permission to access your device's camera for facial recognition purposes, nor will it collect any facial information through any other means.
5.2 To comply with Apple's App Store review guidelines, the App may request your permission for App Tracking Transparency (ATT). We do not engage in any user tracking activities, and declining this permission will not affect the normal use of the App's core functions.
5.3 You shall authorize the App's required permissions in accordance with the prompts, and shall not falsely obtain permissions by improper means. If you revoke the authorized permissions, some functions of the App (such as local image upload) may be unavailable, and we shall not be liable for any inconvenience caused thereby.
6. In-App Purchases (If Applicable)
6.1 The App may provide optional in-app purchase services (such as ad-free experience, advanced background template packages), which are processed through Apple's official in-app purchase system. The transaction rules and related responsibilities shall be subject to Apple's relevant terms.
6.2 Before making an in-app purchase, you shall carefully confirm the product information (including but not limited to product name, price, and service content). Once the purchase is completed, no refund will be provided unless required by applicable laws or due to technical failures of the App.
6.3 The in-app purchase products are for your personal use only, and you shall not share, transfer, or resell them to third parties.
7. Disclaimer of Liability
7.1 The App is provided on an "as is" basis. We have made reasonable efforts to ensure the stability and normal operation of the App, but we do not guarantee that the App will be free of errors, bugs, or interruptions. We shall not be liable for any direct or indirect losses caused by the temporary unavailability of the App due to technical failures, server maintenance, or other reasons.
7.2 We shall not be liable for any losses caused by your improper use of the App, violation of this Agreement, or reliance on the information provided by the App.
7.3 The App may be affected by factors such as your device performance, network environment, and system version. You shall ensure that your device meets the minimum operating requirements of the App. We shall not be liable for any incompatibility issues between the App and your device.
8. Termination of Use
8.1 You may terminate your use of the App at any time by uninstalling the App.
8.2 If you violate any terms of this Agreement, we reserve the right to restrict or terminate your right to use the App without prior notice. You shall bear all legal consequences arising therefrom.
8.3 The termination of this Agreement does not affect the validity of the provisions that should survive after termination (including but not limited to intellectual property rights, disclaimer of liability, and dispute resolution).
9. Changes to This Agreement
9.1 We may update this User Agreement from time to time to adapt to changes in the App's functions, technological development, or applicable laws and regulations.
9.2 If we make any changes to this Agreement, we will update the "Last Updated" date at the top of this Agreement and display a notification within the App (if applicable) to inform you of the updates. Your continued use of the App after the updates take effect will be deemed as your acceptance of the revised Agreement. If you do not accept the revised Agreement, please stop using the App immediately.
10. Contact Us
If you have any questions, suggestions, or complaints about this User Agreement or the App, please contact us via email at:
We will respond to your inquiry as soon as possible (typically within 3-5 business days).