Privacy policy

Last updated: 02/09/2025

TLDR: No accounts required, no personalized data collected

1. Who we are

Constlet Oy ("we", "our", "us") is the data controller for the White Noise Zen Sleep Sounds application and the zensounds.app website.

2. What data we collect and why

We collect only anonymous, installation‑specific data that helps us operate and improve the service. No information that directly identifies you (such as name, email, IP address or device ID) is ever collected. All data is strictly pseudonymous; neither we nor our processors can link it to a natural person or a specific device.

Legal basis: Legitimate interest (GDPR Article 6 (1)(f)).

3. How we use the data

Measure feature usage and guide product decisions.
Diagnose crashes and technical issues.
Manage in‑app purchases and subscriptions (pseudonymous purchase data itself is handled separately by RevenueCat; see Section 5).

All processing is performed on pseudonymous data only. The data is never sold, shared with advertisers, or combined with other datasets to identify you.

4. Retention and aggregation

5. RevenueCat (in‑app purchases)

We use RevenueCat Inc. (United States) to validate App Store / Google Play purchase receipts and manage subscription status. These receipts are pseudonymous and sent directly from the store servers to RevenueCat; they are not stored in our analytics logs. For details on what RevenueCat collects and how long it keeps that data, please see the RevenueCat Privacy Policy: https://www.revenuecat.com/privacy

6. Where the data is processed

Regardless of where you use the app, pseudonymous usage‑analytics events are transmitted directly to EU‑hosted servers and remain in the European Economic Area. No personal data is transferred outside the EEA except the pseudonymous purchase‑related data handled by RevenueCat, as described above.

7. Security

Encryption in transit and at rest.
Role‑based access controls.
Automated log deletion.
Continuous monitoring.

8. Your GDPR rights

The data we hold cannot, on its own, identify any individual or device. GDPR  Article 11 therefore applies. If you exercise a right of access, rectification or erasure, we will first request additional technical information to locate your data (such as guid). If such information cannot be provided, we may lawfully decline the request.

If you would like a fresh guid that cannot be linked to previous events, simply uninstall and reinstall the app. Uninstalling (or no longer using) the app also stops any further analytics collection.

9. Children

Our applications are not directed to children under 13 years of age.

10. Changes to this policy

We may update this notice from time to time. The "Last updated" date shows the current revision.

11. Your Consent

By using our applications, you hereby consent to this privacy policy and agree to its terms.

12. Contact

If you have any further questions about this privacy policy or our data practices, please email mail@constlet.com.