Privacy Policy

Privacy Policy for End-to-End Encrypted Keyboard

Last Updated: September 1, 2025

Hangzhou Jisuan Technology Co., Ltd ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we handle your information in connection with your use of our End-to-End Encrypted Keyboard application (the "App").

By using the App, you agree to the collection and use of information in accordance with this policy.

1. The Short Version

We built this App to protect your privacy. We cannot see, read, or access your messages, keystrokes, or encryption keys. They never leave your device in an unencrypted form. We only collect minimal, non-identifiable data to keep the App running smoothly. We do not sell your data to anyone.

2. Information We Do NOT Collect (Our Core Principle)

Due to our end-to-end encrypted ("E2EE") and zero-knowledge architecture:

We do NOT collect, store, or transmit your messages. All encryption and decryption happen locally on your device.
We do NOT collect, store, or have access to your private encryption keys. You are solely responsible for key management and secure sharing with your intended recipients.
We do NOT log your keystrokes, typed content, or personal conversations.
We do NOT sell, rent, or trade any personal data.

3. Information We Collect for App Functionality

To provide and maintain our Service, we collect the following limited information:

Category of Information	Purpose	Legal Basis (GDPR)
Technical & Device Data (e.g., device type, OS version, unique device identifier, mobile network information)	To ensure compatibility, troubleshoot crashes, and optimize performance.	Legitimate Interest
App Usage Data (e.g., feature usage frequency, button clicks, diagnostic reports via crash logs)	To understand how the App is used and identify areas for improvement.	Legitimate Interest
Approximate Location (derived from IP address)	For basic analytics and service regionalization.	Legitimate Interest

This data is aggregated and anonymized; it cannot be used to identify you personally.

4. How We Use Your Information

We use the limited information we collect to:

Provide, operate, and maintain the App.
Improve, personalize, and expand the App's features.
Understand and analyze how you use the App.
Develop new products, services, and features.
Communicate with you, including sending technical notices and security alerts.

5. Data Retention

We retain the collected technical and usage data only for as long as is necessary to fulfill the purposes outlined in this privacy policy. We will retain and use your information to the extent necessary to comply with our legal obligations, resolve disputes, and enforce our policies.

6. Your Data Rights (For EEA & UK Users)

Under the General Data Protection Regulation (GDPR), you have the right to:

Access the personal information we hold about you.
Rectify inaccurate personal data.
Request Erasure ("be forgotten") of your personal data.
Restrict or object to our processing of your personal data.
Data Portability.

To exercise any of these rights, please contact us at ylkf@hzjisuan.com. We will respond to all requests within the timeframe required by applicable law.

7. International Data Transfers

Your information may be transferred to and processed in countries other than your own. We ensure all transfers are protected by appropriate safeguards, such as Standard Contractual Clauses (SCCs), to guarantee that your data receives an adequate level of protection.

8. Children's Privacy

Our App is not intended for use by children under the age of 13 (or 16 in the EEA). We do not knowingly collect personally identifiable information from children. If you become aware that a child has provided us with personal information, please contact us. We will take steps to delete such information from our systems.

9. Changes to This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last Updated" date. You are advised to review this Privacy Policy periodically for any changes.

10. Contact Us

If you have any questions or concerns about this Privacy Policy or our data practices, please contact our Data Protection Officer (DPO) at:

Hangzhou Jisuan Technology Co., Ltd
Email: ylkf@hzjisuan.com
Website: [www.hzjisuan.com]