Privacy Policy

Effective date: August 25, 2026

1. Who we are

Shenzhen Linear Regression Technology Co., Ltd ("we", "us") operates mobile applications and related online services, including the Cinnabar application. This policy explains what data we collect, why, and the choices you have.

2. Data we collect

• Account data — identifiers and contact details you provide when creating an account.
• Service data — information you submit to use our services, such as birth date, time and place used to generate readings, and chat messages.
• Device and usage data — device identifiers, app version, and coarse usage analytics used for product improvement and fraud prevention.
• Purchase data — subscription and purchase records processed by the app store and our payment service providers.

3. Why we process your data

• To provide and personalize our services (contract performance);
• To comply with legal obligations (e.g., accounting, consumer protection);
• With your explicit consent, to send AI-generated content for processing by third-party AI providers (see section 4);
• To detect and prevent fraud and abuse (legitimate interest).

4. AI processing disclosure

Where you use AI-assisted features, the data needed to generate a response (such as your birth data and chat messages) is sent to our AI service providers. We currently use OpenRouter (United States; EU-routed endpoints for EU/UK users) and Groq (EU endpoint, Helsinki, Finland) as AI sub-processors. Both are configured so that your data is not used to train models. Before your data is sent to an AI provider, the app asks for your explicit consent.

5. Sharing and sub-processors

We do not sell your personal data. We share data only with service providers who process it on our behalf, under data processing agreements:

• AI providers — OpenRouter, Groq (see section 4);
• Hosting & infrastructure — Tencent Cloud International Pte. Ltd. (Singapore entity; data hosted in its United States data center) and Cloudflare, Inc. (content delivery and domain services);
• Payments — Apple Inc. (App Store billing) and RevenueCat, Inc. (subscription and purchase processing);
• Email — Zoho Corporation (support and transactional email).

We may also disclose data where required by law.

6. Retention

We retain personal data only as long as necessary for the purposes above. Chat content is stored in summarized form where possible. You may delete your account and data at any time from within the app.

7. Your rights

Depending on your jurisdiction (including GDPR in the EU/UK and CCPA/CPRA in California), you may have rights to access, correct, delete, export, or restrict processing of your data, and to withdraw consent at any time. Contact us to exercise these rights.

8. Children

Our services are not directed at anyone under 18, and we do not knowingly collect data from children under 18.

9. International transfers

Our services are hosted in the United States. AI processing for EU/UK users is routed through EU-based endpoints. Where data is transferred outside the EU/UK, we rely on appropriate safeguards such as Standard Contractual Clauses.

10. Security

We use encryption in transit (TLS), restrict access to personal data, and apply rate limiting and abuse controls to protect our systems.

11. Changes to this policy

We will update this page when we change this policy and, where required, notify you in-app.

12. Contact

Questions about this policy: support@linregtech.com.