Terms of Use
Effective 27 September 2026
By using Hydronic Calculator you agree to these terms and to Apple’s Standard End User License Agreement (or the Google Play Terms of Service on Android).
Engineering disclaimer
The app provides estimates from standard engineering formulas for qualified heating professionals. Results are not a substitute for professional design, manufacturer data or local codes. Always verify before installing. You use the results at your own risk.
Purchases
Hydronic Calculator Pro is a one-time, non-consumable purchase. It is not a subscription and does not renew. You can restore it on your devices with “Restore Purchases”. Refunds are handled by Apple or Google under their policies.
Limitation of liability
To the extent permitted by law, we are not liable for any damage, loss or cost arising from the use of calculation results. Our total liability is limited to the amount you paid for the app.
Governing law
These terms are governed by the laws of Poland, without prejudice to mandatory consumer protections in your country.