Updated date: September 27, 2024

Mathfuns is a platform provided by Beijing Xingxinghai Technology Co., Ltd. (hereinafter referred to as "us") to offer services such as mathematical formula editing, problem-solving, drawing, and analysis. We highly respect the protection of users' personal information. When you use the services provided by Mathfuns, we will collect, store, and use your personal information in accordance with this privacy policy. This privacy policy contains the terms of our collection, storage, and use of your personal information. We hope to provide you with a clear understanding of how we handle your personal information through this privacy policy. Therefore, we recommend that you read this privacy policy in its entirety to help you understand and protect your privacy rights. If you have any questions about this privacy policy, you can contact us through the contact information published by Mathfuns. If you do not agree with any content of this privacy policy, you should immediately stop using Mathfuns services. When you use any of the services provided by Mathfuns, you agree to our lawful use and protection of your personal information in accordance with this privacy policy.

1 Scope of application

This privacy policy applies to all services provided by Mathfuns.

In particular, this Privacy Policy does not apply to services provided by third parties that are subject to, linked to, or repackaged our Services. Although third parties display, link to, or repackage our Services, we do not know or control their actions and are therefore not responsible for their actions; please access or use their services with caution before you have reviewed and accepted their privacy policies.

If you allow us to share information with third-party websites, you are also subject to the third-party website terms of service and privacy policy.

2 How to collect information

2.1 Computing services

Process user submitted calculation expressions, application versions, and other information through HTTPS RESTful API, and return the calculation results to the client.

2.2 Calculator

Store the calculated expressions, results, and other information locally for users to view and modify.

2.3 Geometric drawing board

Store the drawing information locally for users to view and modify.

2.4 The sharing necessary to implement our services or functions

Payment Services

• Usage scenario: Order payment
• Purpose of use: To ensure transaction security and complete payment for goods or services
• Personal information type: Order payment related information
• Recipient type: Partner providing payment services
• Sharing method: backend interface transmission

2.5 Third party SDK

Google Play Billing

• SDK Name: Billing Library
• Third party entity: Google LLC
• Purpose of use: Online payment
• Usage scenario: Purchase membership services
• Personal information types: payment order information, user information, etc
• Sharing method: SDK local collection
• Official website link:https://developer.android.com/
• Privacy Policy:https://policies.google.com/

2.6 Device permission call

Storage permission: You need storage permission when saving formula images. During your operation of this application, we promise to store only the information necessary for the application. Turning off storage permissions will affect the save function, but will not affect other services.

3 How to use information

We use the information collected to provide you with services and improve the quality of services. To this end, we will use your information for the following purposes:

• Provide services to you
• Help us design new services and improve our existing services
• Other uses with your permission

4 Information that may be shared

We do not share your personal information with any other company, organization or individual, except in the following cases:

• Get your prior consent or authorization
• According to the provisions of laws and regulations or the requirements of the executive or judicial organs
• Protect the personal safety and property of us, customers or anyone else in an emergency
• Some of your personal information may be shared with partners to provide better customer service and user experience, but will supervise the partner company to comply with the provisions in the privacy protection statement to protect user privacy, and will only share the personal information necessary for the service

5 Protection of minors

We attach great importance to the protection of minors' personal information. If you are a minor, it is recommended that you ask your guardian to read this policy carefully and use our services or provide us with information with your guardian's consent.

6 Change

We may make adjustments or changes to this Privacy Policy at any time. Any update to this Privacy Policy will be published on the website in the same way as the update time without further notice to you separately. The adjustment or change will take effect immediately upon publication. If you continue to use any of the services we provide or visit our relevant websites after the adjustment or change of the privacy policy, we believe that this means that you have fully read, understood and accepted the revised privacy policy and are bound by it.

7 Contact us

If you have any questions, suggestions or complaints about this Privacy Policy, please contact: mathfuns@hotmail.com.