Privacy Policy

This policy describes the OmniCalc V2.5 application and this website. Last updated: 13 November 2026.

The OmniCalc application

• No account or login is required.
• Saved on your device: calculation history, favorites, custom conversions and formulas, and your settings. On Windows these are files in your user data folder; in a browser or the Android app they live in the app’s local storage. Nothing is uploaded by OmniCalc.
• Network use: core calculators and tools work offline. The one feature that uses the internet is the optional Download rates button in Custom Conversions. It is started only by you and requests exchange rates from the public service open.er-api.com. That service can see your IP address like any website you visit. The Android app declares the internet permission for this feature.
• No analytics or telemetry and no third-party advertising are built into the application, according to the project’s source code and documentation.
• Backups you export are files you control. Anyone with access to your device or user account may be able to read the saved data, so protect your device.

This website

• It is a static website with no accounts, no forms, no database and no analytics.
• It stores one item in your browser’s local storage: your light or dark theme choice, so it can be remembered. You can clear it from your browser settings.
• Download buttons will link to files hosted on GitHub Releases. When you download, GitHub handles that request under its own privacy policy.
• Email buttons open your email app. Messages you send are handled by your email provider and the developer’s.

What has not been verified

This policy describes the project’s code and documentation. The application has been functionally tested during development, but it has not undergone an independent security audit or a full accessibility review. If that changes, this page will be updated.

Contact

Questions about privacy? Use the Contact page.