Mini Calc

This Privacy Policy describes how Mini Calc processes, collects, stores, uses and protects your information when you use our mobile application. We are fully committed to protecting the privacy rights and personal data security of all our users, and we design all our product features and data processing mechanisms around the core principle of minimal data collection and maximum user privacy protection.

1. Information We Collect

Mini Calc is designed as a fully offline application, and we strictly limit the collection of user data to the absolute minimum required to provide normal service functionality. We do not collect any of your personal identifiable information that can be used to identify your specific identity, including but not limited to your name, address, email address, phone number, location data, device identifiers, contact lists, browsing history or any other sensitive personal information.

All calculation records, user custom settings, calculation templates and other data generated during your use of the application are stored 100% locally on your own mobile device, and these data will never be automatically uploaded to any of our servers or third-party servers under any circumstances. The only data that may be transmitted over the network is the necessary subscription verification data when you purchase the premium version of the application through the Apple App Store, and this data processing is completely handled by Apple's official platform in accordance with Apple's standard privacy regulations, and we do not have the authority to access or obtain this part of your data at all.

We do not integrate any third-party data collection SDK, tracking tool, advertising statistics framework or user behavior analysis component in the application, and no third party can obtain any of your data generated when using Mini Calc through our application.

2. How We Use Your Information

Since we do not collect any of your personal data on our servers, there is no scenario where we use, process, analyze or share your personal information. All data processing operations are completed locally on your device, and all calculation functions run in a completely offline environment. The local data stored on your device is only used to provide you with the following core functions:

• Save your calculation history records, so that you can view, search and manage past calculation results at any time
• Save your custom application settings, including calculation precision configuration, angle/radian mode selection, theme preference, unit default settings and other personalized configuration items
• Save your custom calculation templates and frequently used calculation formulas, to improve your use efficiency
• Record your local usage preferences to optimize the interactive experience of the application

None of the above data will leave your device, and you can completely delete all these data at any time by clearing the application cache or uninstalling the application. We will never use any of your data to push advertisements, conduct user portrait analysis, share with third parties for commercial purposes, or use it for any other purposes that are not directly related to the normal operation of the application.

3. Data Storage and Security

All user data generated in Mini Calc is stored in the private sandbox directory of the application on your mobile device. The iOS system has strict security isolation mechanism for the application sandbox, and no other third-party applications can access the data in the Mini Calc sandbox without your explicit authorization. We do not use any cloud storage service to back up your data, so all data security is directly related to the security of your own device. We recommend that you use the device's own password, Touch ID or Face ID protection function to ensure that no unauthorized person can access your device and the data stored in the application.

We adopt industry-standard data encryption technology to protect the local data stored in the application. All sensitive calculation records can be optionally encrypted and stored, which can effectively prevent data leakage even if your device is lost. We will never transmit any of your local data to the public network, which fundamentally eliminates the risk of data interception, leakage or abuse during network transmission.

Since we do not collect any user data on the server side, there is no possibility of our server being hacked and leading to large-scale user data leakage. This architecture design fundamentally avoids almost all common data security risks faced by traditional network applications.

4. Information Sharing and Disclosure

We do not share, trade, rent or disclose any of your personal information to any third parties for any reason. Since we do not store any of your personal information on our servers, there is no data that can be shared or disclosed. We will not transfer any user data to third parties for commercial marketing, advertising delivery, data analysis or any other purposes. We will not disclose your information to government regulatory authorities, law enforcement agencies or other third parties unless we are required by mandatory legal provisions, court orders or government administrative orders that have legal effect.

We do not cooperate with any data brokers, advertising platforms, data analysis service providers or other third-party organizations that may be interested in user data. Our product development and operation process do not rely on any user data provided by third parties, and we do not exchange user data with any other companies.

5. Third Party Services

The only third-party service involved in Mini Calc is the Apple App Store subscription payment service. When you purchase the premium subscription of the application, the entire payment process, subscription management and receipt verification process are completed through Apple's official service. The data related to your payment and subscription will be processed in accordance with Apple's official privacy policy. We can only obtain the basic verification result of whether your subscription is valid, and we cannot obtain any other information related to your Apple account, payment method or personal identity.

We do not embed any other third-party services in the application, including but not limited to third-party statistical tools, advertising SDKs, social sharing components, push notification services, cloud synchronization services, etc. All functions of the application can be used normally without connecting to any third-party server.

When you click the link to Apple's End User License Agreement in the application, you will be redirected to Apple's official website, and the data collection behavior on that page is completely governed by Apple's privacy policy, which is beyond our control scope.

6. Children's Privacy Protection

Mini Calc is not specifically designed for children under the age of 13. We do not intentionally collect any personal information from children under the age of 13. Since our application follows the design principle of no data collection, we will not actively obtain any personal data of any user, including children. If you are a parent or guardian and you believe that your child has used our application and generated some personal data, you can contact us through the contact email we provide, and we will help you delete all relevant data from the device according to your requirements.

We encourage parents to supervise their children's use of mobile applications, to ensure that children can safely use various digital tools. Our application does not contain any content that is harmful to minors, and all calculation functions are suitable for users of all age groups.

7. User Rights

Since all your data is stored locally on your own device, you have full control over all your data. You can exercise the following rights at any time:

• Access: You can view all your calculation history and custom settings directly in the application at any time
• Correction: You can edit and modify any of your calculation records and custom settings at any time
• Deletion: You can delete a single calculation record, clear all calculation history, or delete all application data by uninstalling the application at any time
• Export: You can export your calculation records to other formats for local backup through the export function provided in the application

Since we do not store any of your data on the remote server, we do not need to provide you with a dedicated data download or deletion channel on the server side, and all data management operations can be completed directly on your local device. If you have any questions about data management, you can contact us through the support email, and we will provide you with detailed operation guidance.

8. Changes to This Privacy Policy

We may update this Privacy Policy appropriately according to the adjustment of product functions, the change of legal requirements or the optimization of service mechanism. When we make any changes to this Privacy Policy, we will release the updated version in the new version of the application and on our official technical support page. We will not reduce your rights under this Privacy Policy without your explicit consent. We recommend that you check this Privacy Policy regularly to understand the latest regulations on how we protect your information.

Your continued use of Mini Calc after the updated Privacy Policy takes effect will be regarded as your recognition and acceptance of the updated Privacy Policy. If you do not agree to the content of the updated Privacy Policy, you can choose to stop using the application and uninstall it from your device.

9. Contact Us

If you have any questions, suggestions or complaints about this Privacy Policy, or any issues related to data privacy protection when using Mini Calc, please contact us through the following email address: koudaijisuan2018@163.com. We will reply to your message as soon as possible after receiving it, and do our best to solve the relevant problems for you.