Privacy Policy — Naho's Math Adventure
Last updated: July 19, 2026
1. About this app
Naho's Math Adventure ("the app"), made by Elastic Cell, is a learning game where children practice addition, subtraction, multiplication, and division. The app contains no advertising and no third-party analytics. There is an optional monthly premium subscription; payment is handled entirely by Apple's App Store.
2. What we collect
| Data | Example | When | Why |
|---|---|---|---|
| ID | naho | Sign-up | Signing in |
| Password | — | Sign-up | Signing in (we never store it ourselves; Google Firebase Authentication stores it encrypted) |
| Nickname | Naho | Sign-up | Shown on the leaderboard |
| Age | 8 | Sign-up | Context for learning progress |
| Learning progress | Level, stage, score, creatures collected | During play | Resuming, leaderboard |
If you sign in with Google, we receive the email address and display name Google provides. The ID is set to the part of the email before @, and age is stored as 0.
If you subscribe, the app only checks the Apple-issued receipt on the device to see whether a subscription is active. We never receive or store payment or card details.
The app does not collect location, contacts, photos, device identifiers, or call logs. No advertising or analytics SDKs are included.
3. How we use it
- Signing in and resuming: so a child can continue on another device with the same ID, including the Android version of the app.
- Leaderboard: nickname, highest level reached, average score, and number of creatures collected are visible to other players. IDs, ages, and email addresses are not.
We do not sell this data or use it for advertising.
4. Where it is stored
In Google Firebase Authentication and Cloud Firestore. Google acts as our data processor, and data is encrypted in transit over HTTPS.
- Google Privacy Policy: https://policies.google.com/privacy
- Firebase Data Processing Terms: https://firebase.google.com/terms/data-processing-terms
- Apple Privacy Policy (payments): https://www.apple.com/legal/privacy/
5. How long we keep it
For as long as the account exists. Deleting the account deletes the data immediately.
6. How to delete it
You can delete everything from inside the app: Settings → "Delete account and all data".
You'll be asked to confirm. Confirming permanently deletes the sign-in account, account details, learning progress and collected creatures, leaderboard entries, and the progress stored on that device. This cannot be undone.
A subscription must be cancelled separately in the App Store (Settings → Apple Account → Subscriptions); deleting the account does not cancel it.
If you can't access the app, email admin@nahomath.com.
7. Children's privacy
This app is intended for children.
- We do not ask children for information beyond what the app needs.
- We do not show behavioural advertising to children (there is no advertising at all).
- Only the nickname the child chooses appears on the leaderboard — please encourage the use of a nickname rather than a real name.
- Parents and guardians can delete a child's data at any time using section 6.
8. Sharing
We do not share data with third parties except where required by law. Google (Firebase), described in section 4, processes data on our behalf.
9. Your rights
You may request access to, correction of, or deletion of your data. Deletion is available directly in the app (section 6); for anything else, email admin@nahomath.com.
10. Changes
If this policy changes we will update the date above and notify you in the app for significant changes.
11. Contact
Elastic Cell (Representative: Eunjeong Choi)
admin@nahomath.com