Privacy
Local by default
Display settings, favourites, calculation records, user-entered observations, alerts, learning progress and backups stay in this browser by default. No account or payment information is required for current features.
Export and deletion
You decide when to download a JSON or CSV file. Delete exported files yourself, or clear MetalCast site data in the browser to remove local records.
Support and advertising
Support intake is enabled only after an encrypted service and a real operator are configured. Diagnostics exclude calculation records unless the user explicitly supplies them. Advertising remains disabled until Google approval and the configured privacy choice.
Reviewed 31 August 2026. The Korean policy is the operational source for this release.