Support

Handy Calculations is an offline oilfield engineering reference and calculator app for iPhone, iPad and Android. Its calculators and tables work with no internet connection, it requires no account, and it doesn't collect your personal data. Subscription purchases are handled by the Apple App Store or Google Play.

Need help?

For questions, bug reports, or feature requests, email randyrwood@gmail.com. Please include your device model, your iOS or Android version, and a short description of what happened.

Privacy

Read the Privacy Policy. In short, the app itself doesn't collect your personal data, and purchases are handled by Apple or Google.

Terms

Read the Terms of Use, including subscription terms.

A note on accuracy

Handy Calculations is a convenience reference. Always verify results that matter before relying on them for operational or safety decisions.