Privacy Policy

Calculator 10 is an Android app provided by Northjade. The app does not require a Northjade account.

Calculations And Local Data

Calculator inputs, results, history, memory, preferences, and saved-date entries are stored locally on your device. Northjade does not receive this content through an app account or Northjade server. Android backup behavior may be controlled by your device and Google account settings.

Currency conversion downloads current reference-rate data from the Frankfurter exchange-rate service over HTTPS; conversion amounts are calculated on your device and are not sent to Frankfurter. The speed test exchanges generated test data with Cloudflare speed-test endpoints over HTTPS. These tools do not upload your calculator history, saved entries, files, contacts, or messages.

Advertising And Privacy Choices

The free version may show banner, interstitial, and rewarded ads through Google AdMob. Google User Messaging Platform requests and stores applicable advertising privacy choices before the app requests ads.

Depending on your region, device settings, and choices, Google may process information needed to deliver, measure, limit, and protect ads. This may include IP address, approximate location inferred from IP, device or advertising identifiers when available, app interactions, consent signals, and diagnostics. A Privacy Choices entry is shown in the app when Google reports that it is required.

Analytics And Crash Reporting

The release may use Firebase Analytics to understand screen usage and Firebase Crashlytics to identify stability problems. Collection starts disabled and is enabled only after the app receives the final provider-collection decision described by its privacy flow.

Analytics and crash reports may include app interactions, app version, device model, Android version, timestamps, diagnostic state, crash stack traces, and device or app identifiers. They must not include calculator expressions, results, history, memory, saved-date text, currency amounts, or other user-entered calculator content.

Purchases

Google Play Billing processes optional one-time premium purchases and restores existing Calculator 10 premium ownership. Google may process purchase history, transaction identifiers, device/account context, and fraud-prevention information under its own terms. Northjade does not receive your payment-card number.

Any completed Calculator 10 premium purchase recognized by Google Play continues to remove ads. The app stores only the local entitlement state needed to apply that behavior and rechecks current ownership with Google Play.

Data Sharing And Retention

Northjade does not sell personal information. Information handled by Google, Frankfurter, or Cloudflare is governed by those providers' policies and retention practices. Local app data remains until you clear app data, uninstall the app, or remove it through app features, subject to any Android backup copy controlled by your device account.

Children

Calculator 10 is intended for users aged 13 and over and is not directed to children under 13.

Your Choices

You can use offline calculator features without an app account. You can revisit Google ad privacy choices when the app shows that option. You can reset or limit the Android advertising identifier in device settings, decline optional consent where available, remove local data through app or device controls, and uninstall the app.

Contact

For privacy questions, contact [email protected].