← Back to Maranox

Privacy Policy

Last updated: 12 April 2026

Maranox is a marine chart plotter app for Irish waters, built by Brian Sheehan. This policy explains what data the app collects, how it is used, and your rights.

What we collect

• GPS location — used on your device to show your position on the chart, record tracks, and log trips. Your location is not sent to any server unless you choose to use a feature that requires it (e.g. the AIS network, when available).
• Feedback messages — if you use the in-app feedback form, your message and app version are sent to our server. No personal information is attached unless you include it in your message.
• Crash reports — if the app crashes, anonymous diagnostic data may be sent via Firebase Crashlytics to help us fix bugs. No personal information is included.
• Beta signup data — if you sign up to beta test Maranox on maranox.ie, your name and Gmail are stored in Cloudflare KV on EU servers. Purpose: to add you as a Google Play tester and email you the install link. Deleted once you're onboarded as a tester or when you request removal (email contact@maranox.ie). No marketing.

What we do NOT collect

• No personal information (name, email, phone) unless you provide it voluntarily
• No advertising data — the app contains no ads
• No third-party analytics or tracking
• No device IDs or fingerprinting

Data stored on your device

• Fishing marks — saved locally on your phone
• GPS tracks and trip logs — saved locally on your phone
• Downloaded chart packs — saved locally for offline use
• App settings — saved locally (units, preferences)

This data stays on your device. It is not uploaded to any server.

Third-party services

• Firebase Crashlytics (Google) — anonymous crash reporting only. Firebase privacy policy
• Cloudflare R2 — hosts chart pack downloads. No personal data is sent; only the chart file is downloaded.

Data from public sources

The app displays data from INFOMAR (Geological Survey Ireland & Marine Institute), EMODnet, Marine Institute ERDDAP, and OpenStreetMap. This data is publicly available and licensed under CC-BY 4.0 or ODbL as applicable.

Children

Maranox is a professional tool for commercial fishing. It is not directed at children under 18.

Data deletion

All your data (marks, tracks, trips, settings) is stored on your device. Uninstalling the app deletes everything. If you have sent feedback via the in-app form and want it deleted, email us and we will remove it.

Changes to this policy

If we change this policy, we will update the date at the top. Continued use of the app after a change means you accept the updated policy.