LAST UPDATED · OCTOBER 3, 2026

Privacy Policy

Oh Tidepool is a field guide and trip-planning companion for tidepool visitors. It is designed without visitor accounts, advertising, or developer-operated user profiles.

Information the app keeps for you

Your selected sites, alert preferences, temperature preference, and optional display name are kept on your device. If iCloud (Apple's cloud backup service) is enabled for the app, those preferences may sync privately through your own Apple account and across your Apple devices. Oh Tidepool does not receive or operate that iCloud data.

Location and notifications

Location is optional. If you allow it, the app uses your approximate current position on your device to help show nearby tidepools; it is not sent to Oh Tidepool. Notifications are optional local alerts scheduled by your device for the visit windows you select.

Content the app downloads

The app downloads its tidepool sites, photos, field-guide and education tips, and daily conditions from this website's public files, which are hosted by GitHub (raw.githubusercontent.com and GitHub Pages). It keeps a copy on your device so it works offline, and checks for new content when it opens. As with any web request, GitHub receives your device's IP address and standard request information such as the app's network details; see the GitHub General Privacy Statement. These requests carry no account, name, location, or identifier from the app, and Oh Tidepool does not operate a server that receives them.

Public conditions

The app retrieves public tide, ocean, and weather information directly on your device from public data providers: NOAA (tides and buoys), the National Weather Service, and Open-Meteo. Those requests include a site's coordinates, never your own location, and each provider receives your IP address as with any web request. No visitor account, password, email address, or personal profile is required to use the app.

Emails you choose to send

The app's “Share a photo”, “Report a mistake”, and “Suggest a site” links open your own Mail app with an email addressed to support@nduwork.com. Nothing is sent unless you send it, and the app itself does not transmit it. We use what you send only to answer you and improve the site information; shared photos are reviewed and have their location data removed before any publication.

No sale or advertising use

Oh Tidepool does not sell personal information, run advertising, or build a cross-app advertising profile. The app does not use third-party analytics or advertising software development kits (SDKs, the code libraries that let apps connect to outside services).

Changes and questions

This policy may be updated as the app changes. For privacy questions, contact support@nduwork.com. Help with the app is on the support page.