An anonymous identifier generated at install, used to restore your settings (status, referrals) and prevent abuse. It is never linked to a name, email or account.

Your settings and saved places stay on the device. Places you add to the public catalogue are sent to our servers — that is the point of adding them.

Location is used to show tides, weather and nearby POIs. If the user arms a distance alert (start point or beach umbrella), the application tracks their position — including in the background — solely to measure the distance to the marker: tracking only starts when the alert is armed, stops as soon as it is switched off, and everything is computed on the device. It is sent to our tide, weather and map providers to obtain an answer, but is never stored on our servers.

If you write to us, your email (optional) and your message are kept so we can reply. The text is sent to an automatic translation service (Microsoft Azure) so we can understand each other: avoid putting sensitive information in it.

Number of saved places, number of sessions and last-use date, tied to the installation code, never to an identity.

Ads are served by Google AdMob, which may process an advertising identifier under its own privacy policy, with your consent (requested on first launch).