Privacy Policy

1. Who this policy is from

Water Tracker is developed and published by Thierry Vandamme ("we", "the developer"). This policy explains what the app does — and does not do — with information. It covers the Android version distributed through Google Play.

2. What we collect

We collect nothing. Not your name, email address, phone number, date of birth, gender, body weight, health identifiers, contacts, photos, or location. There is no registration, no sign-in and no profile. The app does not ask you for a hydration goal — it is a fixed eight glasses a day for everyone.

The app carries no advertising, analytics or crash-reporting component, and no code capable of making a network request. Nothing about your use of it reaches us, because there is no route by which it could.

3. What the app keeps on your device

What you tap is saved on your device so the app can show it back to you tomorrow. It is kept in the app's own private storage, which the operating system isolates from every other app. Three things make up a day's record, and nothing else:

There are no notes and no free-text fields. A record is written the moment you fill a glass, so a day you filled none leaves nothing behind at all — including a day you opened the app and only looked.

The app also keeps your reminder settings on the device: whether reminders are switched on, how long a gap you asked to be reminded after, the hours you asked to be left alone, and whether you have dismissed the notice introducing the feature. That is four preferences and a dismissal, all chosen by you, none of them describing you, and none of them leaving the device.

This content is created entirely by you. The app never uploads it, and the developer cannot see it. Section 6 covers the one route by which a copy can leave your device.

4. What the app asks for

One thing, and only if you ask for it first. The app can remind you to drink when you have not filled a glass for a while. Reminders are off when you install the app, and the only way to turn them on is the switch in the app's settings. Turning that switch on is what makes Android ask whether you will allow notifications; refusing leaves the switch off, and nothing is scheduled or shown.

You can withdraw that permission at any time in Android's own settings (Settings → Apps → Water Tracker → Notifications), without opening this app. The app checks again every time you come back to it, and stops scheduling reminders when it finds the permission gone.

The reminders are worked out and scheduled entirely on your device, from the times you filled your glasses and the settings you chose. Nothing about them is sent anywhere, and no server is involved in deciding when one appears or what it says.

Beyond that, the app asks for nothing: no storage, and no access to the camera, microphone, location, contacts, calendar, files, or any health and fitness platform.

It also holds no internet permission, which is a stronger statement than a promise: without it the operating system will not let the app open a network connection, whatever a future version or a future bug might attempt.

5. Sharing and third parties

We do not sell, rent, share or disclose your data — because we never receive it. No third-party service, processor or partner is integrated into the app.

The link to our other app

The About screen carries a short section headed More from us, naming Training Diary — another app by the same developer — with a button to its store listing. It is self-promotion, not an advertisement: no ad network is involved, everyone sees the same fixed text, and nothing about you is used to choose it. Tapping the button hands the listing address to your device and nothing else — no identifier, no referral code, nothing about your hydration history — and Water Tracker is not told whether you looked or installed.

Google Play

Google independently collects information when you download, install or update any app — device and installation data, and crash reports or analytics where you have agreed to share them. That collection is theirs, not the app's, and is governed by Google's Privacy Policy. What reaches us through the Play Console is aggregated and anonymised: it identifies nobody, and it cannot tell us what you drank.

6. Backups

The app permits your device's backup, which is how your history can leave the device. Android may copy the app's data — your daily glass counts and fill times — into your Google account backup, and restore it when you reinstall the app or set up a new device. That copy is made and held by Google under their policies. On Android 9 and later, if your device has a screen lock, it is encrypted with a key derived from that screen lock, which Google cannot read. Without a screen lock, or on Android 8 and earlier, it is encrypted with a key Google holds and can read. The developer never sees it and cannot reach it either way.

Two consequences are worth stating plainly:

• If you would rather no copy existed, turn the app's backup off in your device settings (Settings → Google → Backup), or delete the app's backup data from your account.
• Because a backup may exist, uninstalling the app does not necessarily destroy the last copy of your history — see section 7.

The same applies to a direct transfer to a new phone, which copies the app's data along with everything else rather than going through an account at all.

The app has no export or import feature of its own, and no way to hand your history to another app.

7. Keeping and deleting your history

Because everything stays on your device, you decide how long it is kept. There is no copy on any system we control, so there is nothing for you to ask us to delete.

• Tapping a filled glass empties it again, which rewrites that day's record.
• Clearing the app's storage (Settings → Apps → Water Tracker → Storage → Clear storage), or uninstalling it, removes the whole history from the device.
• A backup copy is not covered by either of those — remove it through your Google account's backup settings, as described in section 6.

These actions cannot be undone; be sure you no longer want the history before starting.

8. Security

Your history sits in the app's private storage, which the operating system's sandbox keeps out of reach of every other installed app. On a device with a screen lock it is also covered by the system's own file encryption. The app opens no network connections, so there is no transmission for anyone to intercept.

None of that helps against someone holding your device already unlocked: they can open the app and read your history, as they could any other app on it. Keeping a screen lock on is what stands between your history and anyone who picks the device up.

9. Children

Water Tracker is a general-audience hydration counter. It knowingly collects no personal information from anyone, including children under 13 or the equivalent minimum age where you live.

10. Your rights

Laws such as the GDPR and the CCPA give you rights to see, correct, export or delete personal data a company holds about you. We hold none, on any system we control, so there is nothing for us to look up, correct or erase on your behalf. You exercise the equivalent control directly, on your device, as section 7 describes.

You also have the right to lodge a complaint with your national data protection authority.

11. Changes to this policy

If a future version of the app changes how information is handled, this policy is updated and the date at the top revised before that version ships. Material changes are noted in the release notes on Google Play.

12. Contact

Questions about this policy or about privacy in the app can be sent to: