Privacy Policy

Zentide: Sleep Tracker ("the App", "we", "us", "our"), operated by Tranquil Mind Technology JSC, respects your privacy. This Privacy Policy explains what information we collect, how we use and share it, and the choices and rights you have. By using the App, you agree to this Policy.

Zentide: Sleep Tracker is a sleep tracking and relaxation app offering sleep recording, white noise, sleep sounds, guided meditation, sleep stories, and a smart alarm. You do not need to create an account to use it.

1. Information We Collect

We do not ask you to create an account, and we do not collect your name, email address, or contact details to use the App.

1.1 Information collected automatically

When you use the App, our third-party providers (see Section 3) may collect:

• Device and advertising identifiers — including the Android Advertising ID and other device identifiers, used for advertising, analytics, and fraud prevention.
• Approximate location — derived from your IP address by advertising and analytics services for coarse ad targeting and measurement. We do not collect precise/GPS location, and the App requests no location permission.
• App activity and usage data — screens viewed, features used, sessions, and interactions with content and ads.
• Crash logs and diagnostics — technical information about crashes and performance to keep the App stable.
• Purchase status — records of your subscription/purchases (see Section 3, Google Play Billing) used to unlock premium features and for revenue analytics.

1.2 Information you provide or that stays on your device

The following are processed on your device only and are not uploaded to us or any third party:

• Microphone / sleep audio. With your permission, the App uses the device microphone to detect ambient noise and snoring while you sleep and to record sleep sounds. These recordings and the resulting sleep statistics are stored locally on your device and are not transmitted to our servers.
• Profile photo. If you choose an avatar, the selected image is stored locally on your device and is not uploaded.
• App preferences and sleep history — your settings, notes, sound mixes, and sleep records are stored locally on your device.

2. How We Use Information

We use the information described above to:

• provide, operate, and maintain the App and its features;
• remember your settings and personalize your experience;
• display and measure advertising (including personalized ads where you consent);
• perform analytics to understand usage and improve the App;
• detect, prevent, and address fraud, abuse, and security issues;
• process and validate subscriptions and purchases;
• comply with legal obligations.

3. Third-Party Services

The App integrates the following third-party SDKs/services, which may process data as described. Each is governed by its own privacy policy:

4. How We Share Information

We do not sell your personal information for money. We share information with:

• the third-party services listed in Section 3, for the purposes described;
• advertising partners who serve and measure ads; for personalized ads, device/advertising identifiers, approximate location, and app-activity data are shared with these partners for their advertising purposes;
• authorities or others where required by law, or to protect our rights and users' safety;
• a successor entity in a merger, acquisition, or asset transfer.

5. Legal Bases (EEA/UK — GDPR)

• Consent — for personalized advertising and, where applicable, analytics.
• Legitimate interests — for core functionality, non-personalized measurement, security, and improving the App.
• Contract / legal obligation — to process purchases and comply with law.

You may withdraw consent at any time (see Sections 3 and 7).

6. Data Retention

We and our providers keep data only as long as necessary for the purposes above or as required by law. Advertising and analytics partners retain identifiers according to their own retention schedules; crash and diagnostic data is kept for a limited period. Data stored locally on your device remains until you delete it or uninstall the App.

7. Your Rights

Depending on where you live, you may have the right to:

• GDPR (EEA/UK): access, rectify, erase, port, restrict, or object to processing, and withdraw consent; and to lodge a complaint with your data protection authority.
• CCPA/CPRA (California): know, delete, and correct personal information; opt out of "sale"/"sharing" and targeted advertising; and non-discrimination for exercising your rights.
• Other regions (e.g. LGPD in Brazil, PIPEDA in Canada): comparable rights under local law.

Because the App has no account, we may not hold data that identifies you directly. To exercise a request tied to your data, contact us at the email in Section 12 and include your Android Advertising ID and device details so partners can locate the relevant data. You can also exercise ad choices directly via the UMP consent screen and your device's advertising-ID controls.

8. Children's Privacy

The App is intended for users aged 18 and older and is not directed to children. We do not knowingly collect personal information from children. If you believe a child has provided information through the App, contact us and we will take appropriate steps to delete it. We handle age-of-consent requirements (e.g. under GDPR/COPPA) accordingly.

9. International Data Transfers

Your information may be processed in countries other than your own, including the United States, where our service providers operate. Where required, transfers are protected by appropriate safeguards (e.g. Standard Contractual Clauses).

10. Data Security

We use encryption in transit (HTTPS/TLS) and other reasonable technical and organizational measures to protect information. No method of transmission or storage is 100% secure, so we cannot guarantee absolute security.

11. Changes to This Policy

We may update this Policy from time to time. Material changes will be posted here with a new "Last updated" date. Your continued use of the App after changes take effect constitutes acceptance.

12. Contact Us

Tranquil Mind Technology JSC
No. 3, Alley 98, Vu Trong Phung Street, Thanh Xuan Ward, Hanoi City, Vietnam
Email: contact@tranquilmind.co