Privacy policy

Last updated: 13 October 2026

Duo Angle is provided by Nemanja Stosic / Mak Software Solution. Contact [email protected] with privacy questions.

Measurements and local data

Motion sensors provide live angle readings. Duo Angle stores explicitly saved measurements, optional labels, named targets, and preferences on your device. It does not upload measurements, target names, History, or raw sensor samples. There is no Duo Angle account, cloud sync, application backend, or AI processing.

Delete measurements and targets within the app. Uninstalling can remove local records; restoring Pro does not restore those records. Copies included in device backups are governed by your operating system and backup settings.

Configuration

Firebase Remote Config retrieves the payment switch. Firebase uses an installation identifier and app/device configuration metadata, including language, country, time zone and software versions, to deliver configuration. No measurements, labels, or Apple purchase records are included in these requests. Turning off crash reporting does not disable configuration fetching.

Crash diagnostics

Firebase Crashlytics receives crash reports and nonfatal errors, including stack traces, app/device metadata and installation/session identifiers, to help fix reliability problems. Configuration rollout metadata may accompany reports. Reporting starts enabled and can be disabled in Settings. Duo Angle does not add measurements, labels, target names, or Apple Account details to diagnostics.

Duo Angle does not integrate Firebase Analytics, advertising, or session replay. Diagnostics and configuration serve app operation and reliability, rather than advertising.

Apple purchases

Apple processes iOS Pro purchases, authentication, payment details and refunds. Duo Angle checks verified StoreKit transactions locally to determine access. It does not receive your card details or Apple Account password and does not send purchase receipts to a Duo Angle server.

Service providers and retention

Apple and Google/Firebase process service data under their own policies, potentially outside your country. Their retention periods apply to data they process; local records remain until you delete them or local storage is removed. Review Apple’s privacy policy and Firebase privacy information.

Contact and changes

If you email support, the information you choose to send is used to address your request. Please avoid sending private measurements or payment credentials unless necessary. We will update this page when the app’s data practices change. Contact the address above for privacy or data requests.