Privacy Policy

Effective 27 September 2026

Hydronic Calculator (“the app”) is published by Uladzislau Yasinski, Warsaw, Poland (“we”). This policy explains what happens to your data.

Data we collect

None. The app has no accounts, no ads, no analytics and no tracking. Your calculations, history and projects are stored only on your device and are never sent to us.

Purchases

Payments are processed by Apple (App Store) or Google (Google Play). We never see your name, email or payment details. To confirm your purchase, the app uses RevenueCat, Inc., which receives a random anonymous identifier and the store receipt. See RevenueCat’s privacy policy.

Files you export

PDF reports and text you share leave the app only when you choose to share or save them.

Support email

If you write to us, we use your email only to reply and delete the conversation when it is resolved.

Children

The app is not directed at children and collects no personal data from anyone.

Your rights

Under the GDPR and similar laws you may ask what data we hold about you. Because the app collects none, there is normally nothing to access or delete. Contact: support@hydroniccalc.aeoriaapps.com.

Changes

We will post any changes on this page with a new effective date.