Miaoyan AI Keyboard — Privacy Policy

Last updated: 17 September 2026
Effective: 17 September 2026

This is the English version of our Privacy Policy. A Chinese version is available at /privacy.html. In case of any discrepancy, the Chinese version governs for users in mainland China.

Shenzhen Chainfun Technology Co., Ltd. ("we", "us", "our") operates the Miaoyan AI Keyboard application ("the App"). We understand how important your personal information is to you, and we take appropriate security measures to protect it in accordance with applicable law.

0. Service Availability and Data Location (please read first)

All cloud data is stored on servers located in mainland China. We do not currently operate servers outside mainland China.
The App is not offered to, and is not intended for, users located in the European Economic Area (EEA), the United Kingdom, or Switzerland. If you are located in these regions, please do not use the App.
By using the App from outside mainland China, you acknowledge that your information will be transferred to and processed on servers in mainland China.

1. Information We Collect

Type of information	Purpose	Where stored	Retention
Mobile phone number	Account registration and sign-in	Cloud server (mainland China)	For the life of the account
Conversation text you type	Context required for the AI to generate a reply	Transmitted encrypted to our servers and forwarded to the selected AI model	Retained server-side only while the session is processed; you can clear chat history in the App
AI-generated reply text	Providing the AI writing service	Cloud (usage counts only, not the text itself)	30 days
Contact / chat-partner details you enter	Entered by you, used to personalise AI replies	Cloud server (mainland China)	For the life of the account
Guest identifier and the IP address it was issued from	Tracking free-tier quota before you sign in, and rate-limiting issuance per IP to prevent bulk abuse of the free tier	A random token issued by our server, stored together with the IP address it was issued from. We do not read Android ID, OAID or other native device identifiers	Automatically deleted after 90 days
Screen captures	Recognising on-screen conversation to suggest replies	Transmitted to our servers and forwarded to an image-recognition model	Original images are not retained; only the recognition call is logged
Documents and files you upload	Building your personal / business profile for the AI to draw on	Cloud server	For the life of the account; deleted when you delete your account
Clipboard content	Quickly pasting the other party's message into the keyboard	Read temporarily on-device only; not uploaded	Not stored
Voice recording (microphone audio)	Speech-to-text input	Transmitted for processing, then destroyed immediately	Not stored

2. How We Use Information

To provide core features: AI reply suggestions, text polishing, screen recognition and speech-to-text
To count AI usage for membership services
To improve and optimise the quality of our AI output

3. About the AI

Our AI reply feature is implemented by calling compliant third-party large language model APIs (DeepSeek, Moonshot AI "Kimi", OpenAI, Anthropic Claude and others). Speech-to-text is implemented via the iFlytek MSC SDK. Conversation context you enter is processed locally and sent in de-identified form to the model provider solely to generate reply text. Voice recordings are used only for conversion to text and no audio is retained. We do not use your input data to train models.

All AI-generated content is a suggestion only. The decision whether to send it is entirely yours.

4. Data Sharing and Third-Party SDKs

SDK / Service	Purpose	Data involved
DeepSeek API	AI text generation	De-identified conversation prompt
Moonshot AI (Kimi) API	AI text generation	De-identified conversation prompt
OpenAI API	AI text generation, screen image recognition	De-identified prompt, screenshot
Alibaba Cloud SMS	Sending verification codes	Mobile phone number
Anthropic Claude API	AI text generation (fallback)	De-identified conversation prompt
Tavily Search	Retrieving ice-breaker topic information, analysing links you provide	Search keywords or the URL you provide only — never conversation content. Processed outside mainland China.
iFlytek MSC SDK	Real-time speech-to-text	PCM audio stream (transmitted, not stored)

We do not sell your personal information, and we do not share it with third parties other than as described above or as required by law.

5. Your Rights

Access — you can view saved contacts and conversation records inside the App
Correction — you can edit contact information at any time
Deletion — you can clear chat history, delete contacts, or permanently delete your account and all associated data via Settings → Account Security → Delete Account
Withdraw consent — you can revoke clipboard and microphone permissions at any time in your device settings

To exercise any of these rights, contact us at the address in section 8. We will respond within 30 days.

6. Data Security

We protect your data using SSL/TLS encryption in transit and database access controls. All cloud data is stored on compliant servers located in mainland China. No method of transmission or storage is completely secure, and we cannot guarantee absolute security.

7. Children

The App is intended for adults. We do not knowingly collect personal information from children under 14. If you are under 14, please use the App only under the guidance of a parent or guardian. If you believe a child has provided us with personal information, contact us and we will delete it.

8. Contact Us

For any privacy question, request or complaint:

📧 Email: jetty@ichainfun.com
🏢 Shenzhen Chainfun Technology Co., Ltd.
📍 Room 1412, Tefa Information Technology Building, Qiongyu Road, Science & Technology Park, Yuehai Street, Nanshan District, Shenzhen, Guangdong 518057, China

9. Changes to This Policy

We may update this Policy from time to time. Material changes will be announced in the App and reflected in the "Last updated" date above. Continuing to use the App after a change means you accept the updated Policy.