Privacy Policy

This Privacy Policy explains what data OnceHesap ("we", the "site") collects when you use oncehesap.com, how it is used, and your rights.

Data We Collect

The following data may be collected when you use the site:

• Anonymous usage statistics (page views, browser type, device type)
• Your language preference (stored as a cookie)
• IP address and general geographic region (country level)

Numerical values you enter into the calculators are processed entirely in your browser; they are never sent to or stored on our servers.

How We Use Data

• To provide and improve the service
• To optimize ad placements (through our publishing partner)
• To meet legal obligations

Third-party Services

The site may use third-party analytics and advertising services. Those services are governed by their own privacy policies.

Your Rights

Under GDPR and KVKK you have the right to access, correct, delete and object to the processing of your data. Contact: hello@oncehesap.com.

Updates

This policy may be updated; changes are published on this page. Last updated: 2026-05-26.