Last updated: February 26, 2026. Great Circle Pro collects no personal data. No account or login is required.
Great Circle Pro does not collect, store, or sell personal data. The only third-party service is Google Analytics for anonymous usage statistics.
GA4 for anonymous page views, session duration, browser type, and country-level region. Opt out via the Google Analytics Opt-out Browser Add-on.
Great Circle Pro sets no first-party cookies. Google Analytics sets _ga and _gid for session tracking.
localStorage may store UI preferences (theme, label size) between sessions. No personal data — this data never leaves your device.
When live wind data is selected, Great Circle Pro requests NOAA's public GFS endpoint. No identifying information is included.
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