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Privacy Policy

Last updated: July 14, 2026

1. Introduction

Circle Calculator ("we", "our", or "the app") is committed to protecting your privacy. This policy explains which information stays on your device and how advertising and purchase service providers may process limited data.

            In short: Your calculation values, history, preferences, and project content are stored on your device. The app uses Google Mobile Ads for advertising and RevenueCat for purchases; those providers may process device, advertising, purchase, usage, and diagnostic data as described below.
        

2. Information We Do Not Intentionally Send

We do not intentionally send the following app content to advertising or purchase providers:

Values entered into calculators and calculated results
Calculation history, favorites, or locally saved preferences
Company names, notes, or file contents used in generated reports
Precise location, contacts, photos, or microphone recordings

3. Local Data Storage

The app stores data locally on your device only:

Calculation History: Your saved calculations are stored locally using device storage (SharedPreferences). This data never leaves your device.
App Preferences: Your settings (theme, language, decimal places, angle unit) are saved locally for your convenience.
Onboarding Status: A simple flag indicating whether you've completed the tutorial.

This local app content is not uploaded to our servers. If you choose to share or export a file, the destination you select and the operating system's sharing services may process that content under their own policies.

4. Advertising and Consent

The free version may display advertising supplied by Google Mobile Ads. Depending on your region, consent choices, device settings, and platform rules, Google may process:

Device or advertising identifiers
Advertising interactions and diagnostics
Approximate location inferred by the service
Consent signals used to select personalized or non-personalized ads

On iOS, the app may request App Tracking Transparency permission before using data for tracking. Where required, Google's User Messaging Platform presents consent controls. You can review available choices from the app's privacy settings and from your device settings.

5. Purchases and Subscriptions

RevenueCat helps validate purchases, restore access, and manage Pro entitlements. RevenueCat and the relevant app store may process information such as purchase history, an app user identifier, device/platform information, and diagnostics. We do not receive your full payment-card details.

6. Other Services

The current app uses the following service categories:

Google Mobile Ads and UMP: advertising and consent management
RevenueCat: purchase validation and subscription entitlements
Apple App Store / Google Play: payment processing and subscription management
Local notifications: reminders scheduled on your device

The current version does not use account authentication, cloud sync, Firebase Analytics, or Firebase Crashlytics.

7. Internet and Offline Use

Core calculations and bundled pipe charts can work without an internet connection. A connection may be used for:

Loading advertisements and consent forms
Validating, purchasing, or restoring Pro access
Opening support, privacy, and other external links
Sharing content through a destination chosen by you

8. Your Choices and Deletion

Clear calculation history from the app.
Change available advertising consent choices from the app's privacy settings.
Limit tracking or reset advertising choices in your device settings.
Manage or cancel subscriptions in your App Store or Google Play account.
Uninstall the app to remove its local data from the device, subject to platform backup behavior.

See the Privacy Choices page for direct instructions.

9. Children's Privacy

The app is not designed to request a child's name, contact details, or account. Advertising availability and treatment can vary by age, region, store settings, and consent. A parent or guardian should review the app and device privacy controls before allowing a child to use it.

10. Security

We use platform security controls and encrypted network connections provided by the operating system and service SDKs. No system can be guaranteed completely secure. Keep your device and app updated and avoid placing confidential information in content you plan to share.

11. Service Provider Policies

12. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be reflected with a new "Last updated" date at the top of this page. We encourage you to review this Privacy Policy periodically for any changes.

13. Contact Us

For privacy questions, use the Circle Calculator support page.