Support

Email support@hydroniccalc.aeoriaapps.com — we reply within 2 business days.

FAQ

Restore my purchase? Settings → Restore Purchases, signed in with the same Apple ID / Google account.

Is it a subscription? No. Pro is a one-time purchase.

Found a wrong number? Tap “Report an error” under any result — it opens an email with the app and data version.