Petroleum engineering calculations at your fingertips
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What calculations does WellCalc include?
WellCalc provides a comprehensive suite of petroleum engineering calculators covering drilling, production, completions, and reservoir engineering. Free users have access to basic calculators, while WellCalc Pro unlocks the full library.
Are the calculations accurate?
WellCalc uses industry-standard formulas and equations. However, all calculations are for reference and educational purposes only. Results should always be independently verified before use in operational or safety-critical decisions.
Is my data stored in the cloud?
No. All your data — calculation history, favorites, and settings — is stored locally on your device only. Nothing is sent to external servers.
How do I manage my subscription?
Go to Settings on your iPhone > tap your name > Subscriptions. You can change or cancel your WellCalc Pro subscription at any time. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period.
How do I restore my purchase?
Open WellCalc, go to Settings, and tap "Restore Purchases." This will restore your WellCalc Pro subscription if you've already purchased it on another device or reinstalled the app.
Can I use WellCalc offline?
Yes. All calculations are performed locally on your device and do not require an internet connection. A connection is only needed for initial subscription verification.