Privacy Policy
Welcome to Gridz, a lightweight Sudoku game app designed for iOS devices. At Gridz, we are committed to protecting your privacy and ensuring a secure, personalized experience. This Privacy Policy explains how we handle information related to your use of our App, with a clear focus on transparency—no account creation is required to use Gridz, and we do not collect or share your personal information, including facial information, with third parties.
1. Introduction
Gridz is a Sudoku game app that emphasizes "custom background + minimalist puzzle-solving". It offers three difficulty levels (Easy, Medium, Hard) and two background customization options (copyright-free built-in templates and local image uploads). A key feature of Gridz is that it operates entirely without user accounts—you can start playing immediately after downloading, and all data generated through your use of the App is stored locally on your device only. Importantly, we do not collect any facial information or biometric data of any kind from you. We do not have access to any data stored on your device, nor do we transmit it to any external servers or third parties.
2. Information We Collect
Since Gridz does not require account registration, we do not collect any personal identification information (such as your name, email address, phone number, or date of birth) from you. Furthermore, we explicitly do not collect, access, or process any facial information, facial recognition data, or other biometric information at any time during your use of the App. The only data associated with your use of the App is locally stored on your device and falls into the following categories:
2.1 Local Image Uploads
If you choose to customize your game background by uploading a local image from your device’s photo library, this image is stored exclusively on your device. We do not access, collect, or upload these images to our servers or any third-party platforms, and we do not extract or process any facial information from the uploaded images. The purpose of accessing your photo library is solely to allow you to select and use your preferred images as game backgrounds, and this access is only granted with your explicit permission.
2.2 Game Progress and Records
Gridz automatically saves your game progress (including unsolved Sudoku puzzles) and game records (such as completed puzzles, difficulty levels, completion time, and number of errors) locally on your device. This data is used solely to enable you to resume unsolved puzzles and view your historical game records. We do not collect, store, or process this game data on any external servers, and this data does not include any facial information or biometric data.
2.3 Built-in Templates
Gridz provides built-in copyright-free background templates that are pre-stored in the App’s local resources. These templates are sourced from free, royalty-free image platforms (e.g., Unsplash) and are included to offer you convenient background customization options without requiring you to upload personal images. No data related to your selection of these built-in templates is collected or transmitted outside your device, and the built-in templates do not contain any facial information or biometric data.
3. How We Use Your Information
All data generated or used by Gridz is for the sole purpose of enhancing your in-app experience and enabling core game functions. Specifically:
4. Data Storage and Security
All data related to your use of Gridz is stored locally on your iOS device using secure local storage mechanisms (e.g., GetStorage). This includes any uploaded images and game progress, which are protected by your device’s native security features. Since we do not collect any facial information, there is no risk of facial data being stored, leaked, or accessed by unauthorized parties through our App. We do not have any access to this data, and it cannot be accessed by third parties unless you explicitly share your device or grant permission to other apps. You have full control over this data: you can delete your game records directly through the App’s "Clear Records" function, and uninstalling the App will automatically remove all locally stored data (including uploaded images and game progress) from your device.
5. Permissions
Gridz may request the following permission to enable core features, and we only use these permissions for the stated purposes. We never request or require permission to access your device’s camera, facial recognition features, or any functionality related to collecting facial information:
5.1 Photo Library Access
When you first attempt to upload a local image for a custom background, Gridz will request access to your device’s photo library. This permission is optional—you can decline it and still use the App with built-in background templates. If you grant permission, it is only used to select images for background customization, and we do not access or store any other photos in your library, nor do we extract facial information from any selected images.
5.2 App Tracking Transparency (ATT)
To comply with iOS requirements, Gridz may request your permission for app tracking. However, we do not engage in any tracking activities—this request is purely to meet Apple’s App Store guidelines. Declining this permission will not affect any core functionality of the App, and it has no connection to facial information collection.
6. Third-Party Services
Gridz does not integrate any third-party services, including but not limited to advertising networks, analytics tools, social media plugins, or payment gateways (except for optional in-app purchases, which are processed directly through Apple’s official in-app purchase system). None of the services we may interact with (including Apple’s in-app purchase system) involve collecting, processing, or sharing facial information. Apple’s privacy policy applies to any in-app purchase transactions, and we do not collect or process any payment information related to these transactions.
7. Changes to This Privacy Policy
We may update this Privacy Policy from time to time to reflect changes in our App’s functionality or to comply with applicable regulations. Any updates will continue to uphold our commitment to not collecting facial information or any unnecessary personal data. If we make any changes, we will update the "Last Updated" date at the top of this policy and display a notification within the App (if applicable) to inform you of the updates. We encourage you to review this Privacy Policy periodically to stay informed about how we protect your privacy.
8. Contact Us
If you have any questions, concerns, or feedback about this Privacy Policy, our privacy practices, or our commitment to not collecting facial information, please contact us via email at:
We will respond to your inquiry as soon as possible (typically within 3-5 business days).
By using Gridz, you acknowledge that you have read and understood this Privacy Policy and agree to the collection and use of information as described herein, including our explicit policy of not collecting any facial information.