1 to 50
Privacy Policy
Effective: October 14, 2026 (previously June 20, 2026)
한국어 · English
YT Lab ("we") operates the mobile game 1 to 50 ("the app").
This policy explains what information the app processes and how.
1. Information we collect
The app has no sign-up or login. It processes only the following:
| Data | When | Purpose |
|---|
| Nickname (entered by you) | When you submit a score to the leaderboard | Shown on the leaderboard |
| Game result (finish time, grid size, date) | On leaderboard submit | Ranking |
| Random device identifier (generated by the app) | On first submit | One record per device (dedupe) |
| Country/region (inferred from device language/region) | On submit | Flag display and per-country ranking |
| App usage statistics (screens viewed, events such as a game starting and finishing, app instance ID, device model, OS version, app version, language, country/region derived from IP, session duration) | While using the app (processed by Google Analytics for Firebase) | Improving the app from aggregate statistics - see section 3 |
A score is sent to our server only when you tap "Submit" yourself.
If you don't, no leaderboard data is sent and your records stay on your device.
We do not collect name, email, phone, precise location, or contacts.
The random identifier is not an advertising ID (IDFA/AAID) and is not used to track you across other apps or services.
Country/region is a country code (e.g., US) inferred from your device's language/region settings — we do not collect GPS or precise location.
2. Processing & storage
- Submitted leaderboard data is stored in Google Firebase (Cloud Firestore, region: Seoul, asia-northeast3).
- On-device data (best times, settings, the random identifier) stays on your device.
- Retention: for as long as the leaderboard is offered. After uninstalling, a submitted record may remain on the server; you can request deletion at the address below.
- Google Analytics event data is deleted automatically after at most 14 months.
3. Usage analytics (Google Analytics for Firebase)
To improve the app, it uses Google Analytics for Firebase (Google LLC) to produce aggregate usage statistics.
- What is collected - app usage events (screens viewed, progress such as a game starting and finishing), the app instance ID (a random identifier generated by the SDK), device model, OS version, app version, language, approximate location (country/region derived from the IP address - the IP address itself is not stored by Google Analytics), and session duration
- Purpose - aggregate statistics such as retention and drop-off points, used only to improve the app. It is not used to identify individuals and is never sold.
- Retention - per the Google Analytics retention settings, event data is kept for up to 14 months and then deleted.
- See the Google Privacy Policy and how Google uses information from sites or apps that use its services.
4. Third parties
We do not sell personal data. We use the following processor:
- Google Firebase (Google LLC) — storing and reading leaderboard data, and aggregate usage statistics via Google Analytics for Firebase.
Firebase privacy
5. Your rights
You may request access to or deletion of your submitted record. Email us with your nickname and we'll handle it.
6. Children
The app is not directed to children under 13/14, and we do not knowingly collect personal information from children.
7. Changes
If this policy changes, we'll post the update and its effective date here. If new features (e.g., ads) are added, we'll update this policy with the data they collect.
8. Contact
Privacy questions / deletion requests: contact@ytlab.site