Privacy Policy for Diveplan App

Effective Date: 25th October 2026

Thank you for using Diveplan! This Privacy Policy explains what happens to information when you use our mobile application called Diveplan (the "App"). Diveplan has no user accounts, no sign-in, and no server of its own. Everything you create in the App — dive plans, logs, checklists, gas blends, team details, dive-site positions and dives imported from a dive computer — is stored only on your device, and is deleted when you uninstall the App.

1. Information We Don't Collect
   We do not operate a server and we receive none of your data. We do not collect, store or receive your name, email address, phone number, dive records or location. Nothing you enter into the App is sent to us, unless you choose to send us a support file (section 4).
2. What Leaves Your Device
   Three things can leave your device, all as a side effect of the App working rather than as anything we collect:
   • Map tiles. When a screen shows a map — choosing a dive site on a log, or viewing a saved log — the App fetches map data from tiles.openfreemap.org, run by OpenFreeMap. Those requests carry your device's IP address and the coordinates of the area of map on screen. That area indicates roughly where your dive site is: approximate when the map first opens, more precise as you zoom in to place the pin. OpenFreeMap is an independent, volunteer-run service. The map data comes from OpenStreetMap contributors.
   • App updates. Each time the App starts, it asks u.expo.dev — Expo, our build and update provider — whether a newer version of the App's code is available. That request carries your device's IP address, its platform, and the version of the App installed. Expo's privacy policy is at https://expo.dev/privacy.
   • Place search. When you search for a place by name while choosing a dive site, the App passes the words you typed to your phone's own place search, which sends them to Google on most Android phones or to Apple on iPhone. The App sends only the text you typed. It never sends your phone's location or the dive site's position, and text the App recognises as coordinates stays on your phone. Google or Apple also receive your device's IP address, under their own privacy policies. The App does not keep or log your searches.
   All three use HTTPS. Map tiles you have already loaded are cached on your device so the map works offline and loads faster; that cache is local, and is removed when you uninstall the App.
3. Location
   If you allow it, Diveplan reads your device's location to centre the map when you record a dive site. That reading stays on your device and is saved only in the dive log you are editing. It is never sent to us or to anyone else. You can refuse the location permission and place the site by panning the map instead — the App works either way.
4. Asking for Help
   If you choose to ask for help from inside the App ("Get help"), the App prepares a support file on your device and opens your own email app, or your device's share menu, so that you can send it to us. Nothing is sent unless you send it yourself.
   • With "Include my dive data" switched on, the support file contains, as plain text, a copy of the data the App has stored: your dive sites and their locations, dive dates and times, the names and certification numbers of people you dived with, your notes, the names of your plans, checklists and cylinders, your checklist items, and your dive computers' names and serial numbers. It also contains details about the App and your phone, and a list of problems the App has noticed.
   • With "Include my dive data" switched off, names, places, dates, notes and serial numbers are replaced with placeholders before the file is made.
   The App shows you what the file contains before you send it. If you send it, we receive it as an ordinary email, use it only to work out and fix your problem, do not share it with anyone, and delete it once your problem is sorted. Your email provider and ours will handle the email as they handle any other.
5. Information Sharing
   We hold none of your data, so we have nothing to sell or share. The only third parties that receive anything from the App are the services named in section 2, and what they receive is described there.
6. Analytics and Crash Reports
   There are none. Diveplan contains no analytics, advertising, tracking or crash-reporting software of any kind.
7. Deleting Your Data
   Uninstalling Diveplan deletes everything it stored on your device. We hold nothing else, except a support file you chose to send us, which we delete once your problem is sorted.
8. Children's Privacy
   The Diveplan App is not intended for use by children under the age of 13. We do not knowingly collect personal information from children. If we discover that we have inadvertently collected personal information from a child under the age of 13, we will promptly delete that information.
9. Security
   The requests described in section 2 are made over HTTPS. A support file you choose to send (section 4) is not encrypted, so please only send it to the address shown in the App. However, please be aware that no method of transmission over the internet or electronic storage is 100% secure. Therefore, while we strive to use commercially acceptable means to protect your information, we cannot guarantee its absolute security.
10. Changes to this Privacy Policy
    We reserve the right to modify this Privacy Policy at any time. If we make material changes to this policy, we will notify you by updating the "Effective Date" at the top of this page. We encourage you to review this Privacy Policy periodically for any changes. Your continued use of the App after any modifications to this Privacy Policy will constitute your acknowledgment of the modifications and your consent to abide and be bound by the updated policy.
11. Contact Us
    If you have any questions or concerns about this Privacy Policy or your privacy when using the Diveplan App, please contact us at chris@bruford.dev.

By using the Diveplan App, you agree to the terms and conditions of this Privacy Policy.