# Dopamine Tank Privacy Policy

Effective date: October 5, 2026

Dopamine Tank ("the app") is usable anonymously without account registration. This policy describes what we process.

## 1. Information We Process

| Item | Description | When |
|---|---|---|
| Display name | A nickname you choose (shown to friends) | Group create/join |
| Anonymous account identifier | Firebase anonymous auth UID (no email or phone number collected) | First launch |
| Group membership | Group identifier, pokes, water-ticket records | During use |
| Daily screen-time total | Your own device's total daily usage in whole minutes. **Per-app usage details are never collected or transmitted** | Measured automatically |
| Water-ticket request message | Short unlock-request text sent to a friend (optional) | User input |
| Subscription status | Whether you hold a paid plan (Pro/Group/Lifetime) and receipt verification results | Purchase |
| Advertising identifier | Device advertising ID for showing ads (Google AdMob SDK) | Ad display |

The app does **not** collect call content, message content, screen content, keystrokes, or per-app usage breakdowns.

## 2. Purpose

- Providing the shared water-tank service (group level calculation, locking/unlocking, pokes, water tickets)
- Verifying paid subscription entitlements
- Showing ads to non-subscribers

We do not use your information for marketing, and we do not sell or share it with third parties for their own purposes.

## 3. Retention & Deletion

- Data is kept while the service is in use and is deleted when you delete your group or uninstall the app.
- Deleting a group immediately deletes the group document; residual records become inaccessible.

## 4. International Transfer & Processors

- Data is stored in Google Cloud Firestore (us-central1, United States). Google maintains adequate transfer safeguards.
- The Google AdMob SDK processes the advertising identifier for ad display.
- No other third-party sharing occurs.

## 5. Your Rights

- Delete your data at any time by deleting your group in the app or uninstalling the app.
- You can view and edit your display name directly in the app.
- For any other request, contact us below.

## 6. Children

The app is not directed at children under 14 (or under 13 where applicable by local law) and we do not knowingly collect their personal information.

## 7. Contact

- Developer: Jin Minseong
- Email: developerminsing@gmail.com

## 8. Changes

Policy changes will be posted on this page with a new effective date.