Mental Arithmetic APP User Privacy Policy

Update date: June 26, 2026

Effective Date: June 21, 2026

1. Policy Explanation and Scope of Application

This Privacy Policy applies to the mental arithmetic mobile application (hereinafter referred to as "this APP"). It aims to clearly inform all users of all rules regarding the processing of personal information during the operation of this APP, fully safeguarding users' right to know and their personal information rights and interests. This APP is a pure local mental arithmetic assistant tool specifically designed for beginner mathematicians. All functions are completed locally on the user's device, without any network data upload.

This policy is formulated in strict accordance with relevant laws and regulations such as the "Personal Information Protection Law of the People's Republic of China", "Cybersecurity Law of the People's Republic of China", and "Data Security Law of the People's Republic of China". All provisions comply with national regulatory requirements for personal information protection in mobile applications.

2. Personal Information Collection Rules

This APP solemnly declares that it does not collect, store, or upload any personal information of users throughout the entire process.

This app does not require users to perform any registration or login operations, and will not ask users to provide any personal identity-related content such as name, mobile phone number, email address, or identity information;

All data in this app, including mental arithmetic exercises, answer records, usage preferences, etc., are stored exclusively on the local device currently being used by the user. They will not be uploaded to external servers in any form, nor will they be transmitted to any third party;

This app will not actively access any system permissions such as contact list, photo album, location information, microphone, camera, etc. from the user's device, nor will it apply for device permissions unrelated to the core function of mental calculation practice;

This app does not automatically collect any non-essential information such as user device identifiers, browsing history, and behavioral tracks through any means, and there is no hidden data collection behavior.

3. Data Storage and Security Instructions

All operational data generated by all users during the use of this APP is 100% stored exclusively in the local storage space of the user's personal device. The operating entity of this APP is unable to access or obtain these local data through any remote means;

This app will not integrate any third-party SDKs for data statistics, ad tracking, or data sharing, thus eliminating any possibility of third-party channels obtaining users' personal information;

This app does not share, transfer, or publicly disclose any data, and there is absolutely no risk of user personal information being leaked.

4. Protection of User Rights and Interests

Given that this app does not collect any personal information from users, users have complete autonomy over all local data:

Users can delete this app locally on their devices at any time. All locally stored usage data will be permanently cleared along with the app uninstallation, and there will be no residual data left on external servers;

Since this app does not collect any personal information from users, there is no scenario where users need to exercise operations such as information inquiry, correction, deletion, or withdrawal of authorization, thus fundamentally avoiding the possibility of personal information rights being infringed upon;

If users discover any abnormal behavior of data collection in violation of regulations in this APP, they can report it through the designated contact channel at any time, and we will verify and respond to the issue as soon as possible.

5. Explanation on the protection of minors

This app is open to all age groups of beginner math users, especially including minor math beginners. As this app does not collect any user information at all, it will not collect any personal data related to minors, and there is no risk of any personal information of minors being leaked. It fully complies with the relevant national regulations on the protection of minors' online personal information.

6. Policy Updates and Notices

As this APP maintains a pure local product feature without data collection, this privacy policy will remain stable for a long time unless there are special compliance requirements. If this policy needs to be modified due to subsequent updates to laws and regulations or minor adjustments to product functions, we will prompt users about the updated content through a prominent pop-up window when the APP is first launched, and continue to provide services after users have explicitly acknowledged the changes.

7. Contact and Feedback Channels

If you have any questions, comments, or suggestions regarding the content of this Privacy Policy, please contact us via the following official email: Contact email: moakuvhill@gmail.com We will respond and address your feedback within 3 working days upon receipt.