Privacy Policy.
Last updated · 27 May 2026
1. Summary
AquaTrack is a hydration tracker that stores all of your data on your device. We do not operate servers. We do not have user accounts. We do not collect, transmit, sell, or share any personal information. Nothing you log in AquaTrack leaves your iPhone, except — at your explicit request — through Apple HealthKit, which is itself an on-device store managed by Apple.
If you want the short version, that is it. The sections below are the formal version required by the App Store and by privacy laws including the GDPR, UK GDPR, and the California Consumer Privacy Act (CCPA).
2. Scope
This policy applies to the iOS application "AquaTrack" published under bundle identifier com.posterumsoft.watercounterapp and to no other product or service.
3. Data we process on your device
AquaTrack works entirely on your iPhone. The following data is created, stored, and processed locally:
- Hydration logs — the amount and type of fluid you log (water, coffee, tea, juice, etc.), with timestamps.
- Profile inputs — sex (biological), age, weight, height, activity level, wake and sleep times, climate, and similar profile fields you supply during onboarding or in Settings.
- Daily goal — calculated locally from your profile (see Scientific Core documentation in the app).
- Achievements, streaks, insights — derived from your logs by the app.
- App preferences — units (ml/oz), theme, notification settings, language.
- Purchases — your Premium subscription status is read from Apple's StoreKit at runtime; we never receive your payment information.
This data is stored in a local database on your device using Apple's SwiftData framework. We do not transmit, back up to our servers, or otherwise process this data outside your device.
4. Apple HealthKit
If you grant AquaTrack permission, the app reads from and writes to Apple HealthKit. Specifically:
- Reads: dietary water, dietary caffeine, body weight, exercise minutes — for the purpose of calculating your hydration goal and reconciling logs.
- Writes: dietary water and dietary caffeine entries you create in AquaTrack — so they appear in your Apple Health timeline alongside data from other sources.
In accordance with Apple's HealthKit terms (App Review Guideline 5.1.3):
- HealthKit data accessed by AquaTrack is not used for advertising, marketing, or other use-based data mining.
- HealthKit data is never sold or shared with third parties.
- HealthKit data is not stored in iCloud through AquaTrack.
- HealthKit data is used solely to provide hydration-tracking features on this device.
- Hydration and caffeine entries that AquaTrack writes to HealthKit are derived directly from the values you log in the app. We do not synthesize or fabricate values.
You control HealthKit access entirely through iOS Settings → Health → Data Access → AquaTrack. You may revoke individual data permissions or remove AquaTrack's access entirely at any time.
5. In-app purchases
AquaTrack offers Premium subscriptions and a one-time Lifetime purchase through Apple's StoreKit. When you purchase or restore a subscription:
- The transaction is handled entirely by Apple. AquaTrack never sees your name, billing address, email, payment card, or Apple ID.
- AquaTrack reads only the entitlement status (active/inactive, product identifier, renewal flag) from
Transaction.currentEntitlements, which Apple verifies on-device. - We do not maintain a server-side ledger of purchases.
For Apple's handling of your purchase data, see Apple's own privacy policy at apple.com/legal/privacy.
6. Notifications
AquaTrack uses local notifications (scheduled on your device) to remind you to drink water. We do not use remote push notifications. No push token is generated, and no notification metadata is sent to any server.
You can disable notifications at any time in iOS Settings → Notifications → AquaTrack, or by turning off reminders in the app (Settings → Reminders).
7. Third parties
AquaTrack contains no third-party SDKs, analytics frameworks, advertising networks, crash reporters, or telemetry libraries. We do not share your data with any third party because we do not have your data — it stays on your device.
The only external system AquaTrack interacts with is Apple's HealthKit (see §4) and Apple's StoreKit (see §5), both of which are governed by Apple's own privacy practices.
8. Data retention and deletion
Because all data is stored locally on your device, retention is controlled entirely by you:
- Delete a single log: swipe to delete on the Today screen or in the History view.
- Delete all AquaTrack data: uninstall the app. This removes the entire local database.
- Reset AquaTrack data while keeping the app: Settings → Reset.
- Delete HealthKit data: iOS Settings → Health → Browse → Water (or Caffeine) → Show All Data.
We retain no copies of your data on any server, because none ever existed.
9. Your rights
Under the GDPR, UK GDPR, and CCPA you have the following rights with respect to personal data we process about you:
- Access — to obtain a copy of the personal data we hold about you.
- Rectification — to correct inaccurate or incomplete personal data.
- Erasure ("right to be forgotten") — to have your personal data deleted.
- Restriction — to restrict our processing of your personal data.
- Portability — to receive your personal data in a structured, machine-readable format.
- Objection — to object to our processing of your personal data.
- Right against sale or sharing (CCPA) — we do not sell or share personal information.
Because AquaTrack does not transmit your data off your device, we hold no copy of any of it. You exercise all of the above rights yourself, directly on your iPhone:
- Use the in-app History view to inspect and export your logs (CSV export — Premium feature).
- Use Settings → Reset to delete data.
- Use iOS Settings → Health for HealthKit data.
If you nonetheless wish to contact us about any of these rights, you may write to the address in §13.
10. Children's privacy
AquaTrack is intended for users aged 13 and older (16 and older in the European Economic Area, where local law sets a higher age of digital consent). The app is not directed at children below those ages, and the App Store age rating reflects this. We do not knowingly process data from children below those ages.
The app contains a non-medical disclaimer and is not intended to provide medical advice, diagnosis, or treatment, particularly to minors, pregnant users, or users with chronic medical conditions; please consult a qualified medical professional for individual guidance.
11. International users
AquaTrack does not transmit your data internationally — or anywhere else — because all data remains on your device. No cross-border transfers occur, and no Standard Contractual Clauses or equivalent transfer mechanisms are required.
12. Changes to this policy
We may update this policy from time to time. The "Effective date" at the top of this document reflects the most recent revision. Material changes will be reflected in the release notes of the corresponding App Store update, and the in-app "Privacy Policy" link will always point to the most current version.
13. Contact
For any questions about this policy or about AquaTrack's privacy practices, contact:
Pavel Turchenko
Email: [email protected]
You may also reach the same address through the in-app Settings → About → Privacy Policy link.
This document is available in English and Russian. In case of conflict between language versions, the English version governs.