Privacy Policy

This Privacy Policy explains what information StudyFlow collects, how we use it and the choices you have. StudyFlow is operated by 21st Century Network Technology Service Studio (“we”, “us”).

1. Information we collect

• Contact details. Your name, email address and the messages you send us, for example when you subscribe or ask for help.
• Study materials. Files you upload, web page addresses you submit and the text we extract from them.
• Learning activity. The cards and questions created for you, your answers and self-ratings, and your review history.
• Payment details. Payments are handled by our payment provider. We receive the plan, amount and date of each payment, but not your full card number.
• Technical data. Your IP address, browser and device type, and the pages you visit, recorded in server logs.

2. How we use your information

• To turn your materials into cards, questions, feedback and review plans.
• To manage your subscription and answer your messages.
• To keep StudyFlow secure, prevent misuse and fix problems.
• To meet our legal, tax and accounting obligations.

We don’t sell your personal information, and we don’t use your study materials for advertising.

3. AI processing

To create summaries, cards, questions and answer feedback, we send the relevant parts of your materials to AI model providers that process them on our behalf. We send only what is needed for the task you asked for, and we don’t use your materials to train AI models.

4. Web page imports

When you add a web page, we fetch it from the address you provide. We never ask for your passwords to other websites, and StudyFlow doesn’t access pages behind logins, paywalls or other access controls.

5. How we share information

• Service providers that host, store, process or deliver data for us, such as cloud hosting, AI model, email and payment providers. They may use your information only to provide their services to us.
• Legal requirements. When the law requires it, or when it is needed to protect the rights and safety of our users, the public or StudyFlow.
• Business changes. If StudyFlow is reorganized, merged or sold, your information may be transferred to the new owner, who must continue to protect it as described here.

6. Cookies

We use only the cookies needed to run StudyFlow, such as keeping you signed in. We don’t use advertising or cross-site tracking cookies.

7. How long we keep information

We keep your materials and learning history while your account is active. If you delete your account, we delete them within 30 days, except for records we must keep by law, such as payment records. Server logs are kept for a limited time for security and troubleshooting.

8. Security

We protect your information with encrypted connections, access controls and other reasonable safeguards. No system is completely secure, so we can’t guarantee absolute security.

9. International transfers

We and our service providers may process your information in countries other than the one where you live. Wherever it is processed, we protect it as described in this policy.

10. Your rights

Depending on where you live, you may have the right to access, correct, delete or export your personal information, and to object to or limit some uses of it. To make a request, email yangyue_93@163.com. We respond within 30 days. You can also complain to your local data protection authority.

11. Children

StudyFlow is not intended for children under 13, and we don’t knowingly collect their personal information. If you believe a child under 13 has given us personal information, contact us and we will delete it.

12. Changes to this policy

If we update this policy, we will change the “Last updated” date at the top. If the changes are significant, we will also tell you by email or on our website before they take effect.

13. Contact

For privacy questions or requests, email yangyue_93@163.com.