This Privacy Policy describes how your personal information is collected, used, and shared when you use the Calculator app (the "App").

1. Information We Collect

When you use the App, we may collect certain information about you, including:

• Usage Data: We collect information about how you use the App, such as the features you use, the calculations you perform, and the time and duration of your use. This data helps us improve the App's functionality and user experience.
• Device Information: We may collect information about the device you use to access the App, including the device model, operating system, unique device identifiers, network information, and other technical details.
• Photo Data: When you use the photo recognition feature, the App may access photos from your device's camera or photo library solely for the purpose of processing math problems. We do not store these photos unless you explicitly choose to save them within the App.
• Calculation History: The App automatically saves your calculation history locally on your device to provide you with convenient access to past calculations. This data is not uploaded to our servers unless you choose to back it up.

2. How We Use Your Information

We use the collected information for the following purposes:

• To provide and maintain the App's functionality, including processing calculations and generating step-by-step solutions.
• To improve and optimize the App, such as identifying usage patterns and enhancing features based on user feedback.
• To personalize your experience by remembering your preferences and calculation history.
• To troubleshoot technical issues and ensure the App's security and stability.
• To comply with legal obligations and protect our rights and the rights of our users.

3. Data Storage and Security

We take reasonable measures to protect your information from unauthorized access, disclosure, alteration, or destruction. Your calculation history and other personal data are stored locally on your device by default. If you choose to enable cloud backup, your data will be encrypted and stored securely on third-party servers (e.g., iCloud) in accordance with their privacy policies.

Please note that no method of transmission over the internet or electronic storage is completely secure. While we strive to use commercially acceptable means to protect your personal information, we cannot guarantee absolute security.

4. Sharing Your Information

We do not share your personal information with third parties except in the following circumstances:

• Service Providers: We may share information with third-party service providers who assist us in operating the App, such as cloud storage providers or analytics services. These providers are contractually obligated to protect your information and use it only for the purposes we specify.
• Legal Requirements: We may disclose your information if required to do so by law or in response to valid requests by public authorities (e.g., a court or government agency).
• Protection of Rights: We may share information to protect our rights, privacy, safety, or property, as well as that of our users or others.

5. Your Choices and Rights

You have certain rights regarding your personal information, including:

• Access and Correction: You can access and correct your calculation history and other personal data stored locally on your device through the App's settings.
• Deletion: You can delete your calculation history at any time through the App's history management feature. To delete all data associated with your use of the App, you can uninstall the App from your device.
• Opt-Out Options: You can disable certain features that collect data, such as photo recognition, by adjusting your device's permissions. Please refer to your device's settings for more information on managing app permissions.

6. Children's Privacy

The App is not intended for use by children under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that we have collected personal information from a child under 13 without parental consent, we will take steps to delete such information.

7. Third-Party Links

The App may contain links to third-party websites or services. This Privacy Policy does not apply to such third parties, and we are not responsible for their privacy practices. We encourage you to review the privacy policies of any third-party services you access.

8. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page. You are advised to review this Privacy Policy periodically for any changes. Changes to this Privacy Policy are effective when they are posted on this page.

9. Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at jisuanqi3373@163.com.

This Privacy Policy was last updated to reflect the current practices of the App.