Privacy Policy

Double Calculator — Tax & VAT

Last updated: March 21, 2026

This privacy policy describes how Double Calculator ("the App"), published by Eduard Bruch, handles your data. In short: the App does not collect, store, or transmit any personal data. There is no account, no registration, and no server-side processing.

1. Data Controller

Eduard Bruch

Kleinfeld 28c, 21149 Hamburg, Germany

Email: support@eduardbruch.com

2. Data We Collect

None. Double Calculator collects zero personal data.

The App is a paid, one-time-purchase calculator. It does not require an account, does not use analytics or tracking frameworks, does not contain advertising, and does not transmit any data to external servers. All calculations, pinned results, and labels are stored exclusively on your device using local storage and are never sent anywhere.

3. Device Locale Detection

The App reads your device's locale setting (language and region) to automatically select the appropriate country-specific VAT/tax rates and number formatting. This information is processed entirely on your device. It is not stored persistently and is never transmitted to any server.

4. Locally Stored Data

The following data may be stored on your device only:

• Pinned calculation results and user-defined labels
• Selected country preference for VAT/tax rates
• App display preferences

This data exists solely on your device. You can delete it at any time by clearing the app's data in your device settings or by uninstalling the App.

5. Third-Party Services

Double Calculator does not integrate any third-party services. There are no analytics providers, no advertising networks, no crash reporting tools, and no subscription management services. The App is a one-time purchase with no in-app purchases or subscriptions.

6. Device Permissions

Double Calculator does not request access to your camera, microphone, photos, contacts, location, or any other sensitive device feature. The App requires no special permissions beyond standard app execution.

7. Data Sharing

We do not sell, rent, share, or disclose any personal data to third parties, because we do not collect any personal data in the first place.

8. Children's Privacy

The App does not collect personal information from anyone, including children. It is safe for use by all ages. We comply with COPPA (Children's Online Privacy Protection Act) and GDPR provisions regarding minors.

9. Your Rights Under GDPR

Under the General Data Protection Regulation (EU) 2016/679, you have the right to:

• Access (Art. 15) — request information about your data
• Erasure (Art. 17) — delete data by clearing app data or uninstalling
• Data Portability (Art. 20) — receive your data in a portable format
• Object (Art. 21) — object to processing
• Withdraw Consent (Art. 7(3)) — withdraw at any time

Since the App does not collect or process any personal data, these rights are inherently fulfilled. Should you have any questions, please contact us.

10. California Residents (CCPA)

We do not collect, sell, or share personal information as defined by the California Consumer Privacy Act. Since no personal data is collected, there is no data to disclose, delete, or opt out of.

11. Right to Lodge a Complaint

Der Hamburgische Beauftragte für Datenschutz und Informationsfreiheit

Ludwig-Erhard-Str. 22, 7. OG, 20459 Hamburg

https://datenschutz-hamburg.de

12. Changes to This Policy

We may update this privacy policy from time to time. Changes will be reflected on this page with an updated date. Continued use of the App after changes constitutes acceptance of the revised policy.

13. Contact

For questions about this privacy policy, contact: support@eduardbruch.com