WellCalc ("the App") is a petroleum engineering calculator for iOS. Your privacy is important to us. This policy explains what data WellCalc collects, how it is used, and your rights.
Data Collection
Calculation results, favorites, calculation history, field jobs, and user settings are stored locally on your device using Apple's standard storage.
Calculation inputs, results, field-job details, favorites, and notes are not sent to the developer or RevenueCat.
WellCalc does NOT track your location, contacts, photos, or browsing history.
WellCalc does NOT use any third-party analytics or advertising SDKs.
WellCalc does NOT require account creation or login.
Local Data Storage
WellCalc stores the following data locally on your device:
Calculation History: Previous calculations you have performed, stored for your convenience.
Favorites: Calculators and results you have bookmarked.
Settings & Preferences: Your preferred units, display options, and app configuration.
Field Jobs: Job names and optional operating context such as field name, depth, hole size, and mud weight.
This data is not transmitted to the developer. It leaves the device only when you explicitly use an export or share action. Temporary report files are removed after the share sheet closes.
Calculations
All petroleum engineering calculations are performed entirely on your device. No calculation inputs, outputs, or parameters are sent to any external server.
In-App Purchases
WellCalc uses RevenueCat to manage subscriptions and purchase entitlements. The App contacts RevenueCat when it launches and returns to the foreground to check entitlement status and available offerings, and when you purchase, restore, or manage a subscription. RevenueCat processes:
An app-specific anonymous user identifier.
Purchase history, subscription status, product identifiers, and transaction information supplied through Apple's purchase systems.
Limited technical information needed to provide and secure subscription access.
WellCalc does not send your calculations, field jobs, notes, contacts, location, or other app content to RevenueCat. For more information, see RevenueCat's privacy policy.
Data Retention
Your app content is stored locally on your device. Purchase and entitlement records are processed by Apple and RevenueCat as described above.
You can clear your calculation history and favorites at any time within the app.
You can delete individual field jobs or erase all field jobs and their deletion receipts within the app.
Uninstalling the app removes all locally stored data.
Children's Privacy
WellCalc does not knowingly collect data from children under 13. The App is designed for professional and educational use by petroleum engineers and students.
Changes to This Policy
We may update this privacy policy from time to time. Any changes will be reflected in the app and on this page with an updated date.