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24 Calk24

Privacy Policy

As of: April 2026

1. Controller

The controller for data processing on this website is: Konstantin Iakovlev Jl. Tirta Nadi II No. 08, Sanur, Denpasar, Bali, Indonesia Email: [email protected]

2. General Information on Data Processing

All calculations on Calk24.de take place exclusively locally in your browser. No calculation data, inputs, or results are transmitted to our servers or third parties. We take the protection of your personal data very seriously and treat your personal data confidentially in accordance with data protection regulations (GDPR, BDSG, TTDSG).

3. Hosting

This website is hosted on Cloudflare Pages (Cloudflare, Inc., San Francisco, USA). The hosting provider collects access data in log files (IP address, date, time, browser type). This is done on the basis of Art. 6(1)(f) GDPR. Storage is for security purposes for a maximum of 30 days.

4. Cookies and Consent

This website uses cookies. Technically necessary cookies are set on the basis of Art. 6(1)(f) GDPR. For all other cookies (analytics, advertising), we obtain your explicit consent pursuant to Art. 6(1)(a) GDPR and §25 TTDSG. You can revoke your consent at any time.

5. Google Analytics

This website uses Google Analytics 4, a web analytics service by Google Ireland Limited. Google Analytics is only activated after your explicit consent. IP anonymization is enabled. Data is processed on servers in the EU. Legal basis is Art. 6(1)(a) GDPR. You can revoke your consent at any time via the cookie settings.

6. Google AdSense (website) and Google AdMob (app)

This website uses Google AdSense for displaying advertisements. Google AdSense uses cookies and web beacons to show ads based on your previous visits to this and other websites. Google AdSense is only activated after your explicit consent. Legal basis is Art. 6(1)(a) GDPR. For more information, see Google's privacy policy. The mobile app (iOS/Android) shows ads via Google AdMob (Google Ireland Limited), which may process device-related data (e.g. advertising ID, IP address, device information). Before showing personalized ads we obtain your consent via Google's consent platform (UMP); on iOS additionally via the App Tracking Transparency dialog. Without consent, only non-personalized ads are shown. Legal basis is Art. 6(1)(a) GDPR. Your calculation inputs continue to be processed exclusively on your device and are never transmitted to us.

7. Local Storage (localStorage)

We use the localStorage function of your browser to save your theme setting (light/dark) and cookie consents. This data remains exclusively on your device and is not transmitted to us. Legal basis is Art. 6(1)(f) GDPR.

8. Your Rights

You have the following rights regarding your personal data:

  • Right of access (Art. 15 GDPR)
  • Right to rectification (Art. 16 GDPR)
  • Right to erasure (Art. 17 GDPR)
  • Right to restriction of processing (Art. 18 GDPR)
  • Right to data portability (Art. 20 GDPR)
  • Right to object (Art. 21 GDPR)

9. Right to Lodge a Complaint

You have the right to lodge a complaint with a data protection supervisory authority regarding our processing of your personal data.