Customer Support & Help

One Calculator Support

Assistance, bug reports, feature requests, and inquiries for One Calculator.

Direct Email Support

Found a wrong result, a unit or formula you would like added, a Hindi string that reads badly, or a problem with the Remove ads purchase? Write to us and include your phone model and app version if you can.

Frequently Asked Questions

Does One Calculator require an internet connection?

Not for calculating. The calculator, tape, sharing, study tools, money tools, units and formulas all work offline on your device. Only three things use the network: refreshing currency reference rates, verifying a Remove ads purchase, and the banner in the free edition.

How do I restore my Remove ads purchase?

Open Settings in One Calculator and tap "Restore purchase". The purchase is checked with Google Play or the App Store and ads are removed on that device. Remove ads is a one-time purchase, not a subscription, and every feature is free with or without it.

How do I clear my calculation history?

You can delete your history at any time from the app Settings by tapping "Clear Calculation History".