Field policy · effective 28 August 2026
Your evidence stays on your device.
Proof Card has no account, analytics, advertising, remote database, or media upload.
What is stored
Draft details, coordinates, photos, and audio are stored locally in your browser’s IndexedDB. They leave your device only when you choose an export and then share that file.
Location
Location access is requested only after you press “Use my current location.” Exported coordinates are rounded to the precision you choose. Region-only is the default; exact coordinates require an explicit warning acknowledgement.
Retention and control
Data remains until you delete a draft, clear site storage, or uninstall the app. JSON exports are unencrypted files under your control. Importing an export creates a new local draft.
Network use
The installed app may contact its own origin to check for application updates. No bird evidence is sent in that request. There are no third-party runtime scripts or fonts.
Contact
Questions can be raised through the project repository. Do not send sensitive nest coordinates in a public issue.