LEYLINE — PRIVACY POLICY

Privacy Policy

Effective September 22, 2026

LEYLINE does not collect, transmit or sell any personal data.

No account, no analytics, no advertising, no tracking, no third-party SDKs. The app makes no network requests.
Magnetometer readings, survey sessions, GPS trails and annotations are stored only on your device, in the app's local storage. Deleting the app deletes them.
Location is used only while you are surveying or viewing the map (When In Use permission), to place readings on your trail. It never leaves your device unless you export a CSV or GPX file and choose to share it yourself.
Motion sensor (magnetometer) data is processed on-device only.
Children: the app does not knowingly collect any data from anyone.

Changes to this policy

Changes to this policy will be posted on this page.