Water Tracker
Privacy Policy
In short: Water Tracker collects nothing. It has no accounts, no advertising, no analytics, and no code that can reach a network — Android will not let it, as section 4 explains. The only thing it records is how many glasses of water you tapped on a given day and at what time, kept in the app's private storage on your device. It asks for nothing you could grant or refuse. The only way that record leaves your device is your own operating system's backup and device transfer, which section 6 explains and tells you how to turn off.
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 or a reminder time either — the goal 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 are recorded, and nothing else:
| What is kept | Why |
|---|---|
| The calendar date | To keep each day's tally separate and let you page back through previous days |
| How many glasses you filled that day | To draw the glasses as filled or empty and show your progress |
| The time of day each of those glasses was filled | To show when you drank, so you can see how your intake is spread across the day |
There are no notes, no free-text fields and no settings to save. 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.
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
Nothing you could grant or refuse. The app requests nothing of the sort: no notifications, no alarms, no storage, and no access to the camera, microphone, location, contacts, calendar, files, or any health and fitness platform. There is no prompt for you to answer and nothing for you to revoke later.
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.
One technical exception, named here because anyone inspecting the installed app will find it. The app carries a single permission inserted by a Google support library, which allows the app to keep an internal message receiver private to itself. It grants no access to anything on your device, cannot be granted to any other app, and is invisible in the system's permission screens. It is listed in the appendix.
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, nothing about you is used to choose or target it, and everyone sees the same fixed text.
The button does nothing until you tap it. Tapping it hands the listing address to your device, which opens it in the store app or your browser, exactly as if you had searched for it yourself. Water Tracker sends nothing along with it — no identifier, no referral code, nothing about your hydration history — and receives nothing back. It 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, or delete the app's backup data from your account. The appendix gives the current paths.
- 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, or uninstalling it, removes the whole history from the device. The appendix gives the current path.
- 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. Appendix: the current specifics
Everything above describes what the app does, and changes only when its behaviour changes. This appendix names things that can move without any change in behaviour — file names, identifiers, and the wording of menus that belong to Google rather than to us. Treat it as accurate at the date above rather than for ever.
| Detail | At the date above |
|---|---|
| Application id | be.drkdidel.watertracker |
| Where the history is stored | A private SQLite database named water_tracker.db, in the app's private files |
| The three stored fields | date (for example 2026-08-15), filledCount (0 to 8), fillTimes (times to the minute, for example 08:15) |
| The library permission named in section 4 | DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION, prefixed with the application id, at signature protection level |
| Backup setting | android:allowBackup="true", with no rules excluding anything from it |
| Turning backup off | Settings → Google → Backup |
| Clearing the history | Settings → Apps → Water Tracker → Storage → Clear storage |
13. Contact
Questions about this policy or about privacy in the app can be sent to:
Email: thierry.vandamme@pm.me