Introduction
Math Blitz is a mental arithmetic game published by V Developers ("we", "us"). This page explains how the app handles your information. By using the app you agree to this policy and to the Terms of Use below.
Data we collect
| When | What |
|---|---|
| You sign in with Google | Your Google account name, email address and profile photo link, plus a Firebase user ID. Your email stays in Firebase Authentication only and is not written to the game database. |
| You play as a guest | An anonymous Firebase user ID and a generated display name (like Guest_0000). No email or name. |
| You play | Display name, avatar or Google profile photo link, total XP, best score, games played and daily streak. For the daily and monthly leaderboards: your games played, top 5 scores and rating for that period. |
| You report a player | Your user ID, the reported player's user ID and display name, the reason you chose, and the time of the report. |
| Automatically, for security | Device and app integrity signals (Google Play Integrity through Firebase App Check) and a Firebase installation ID, used only to confirm that requests come from the genuine app. Google's servers also process technical data such as your IP address when the app connects. |
Detailed match history (question-by-question results) and your sound and timer settings stay only on your device and are never uploaded. The app requests the Internet, network state and vibration permissions only. It does not access your camera, microphone, location, contacts, photos or files.
We do not use advertising, analytics or crash-reporting services in the app.
How we use your data
- To sign you in and keep your progress when you reinstall or change phones.
- To show daily and monthly leaderboards.
- To keep the leaderboards fair and to review player reports.
- To protect the app from abuse and fake requests.
We never sell your data and we do not use it for advertising.
Leaderboard visibility
Other signed-in players can see: your display name, avatar or profile photo, games played, top 5 scores and rating.
They cannot see: your email address or your match history.
Player reports
You can report a player for an offensive name, harassment, a suspicious score or another reason. Reports are reviewed by us only and are not shown to other players. The reported player is not told who reported them.
When you delete your account, reports that you submitted are deleted. Reports that other players submitted about you may be kept for moderation and removed after review.
Data storage and security
Account and game data is stored in Google Cloud Firestore and handled by Firebase Authentication. Google encrypts data in transit and at rest. Access rules let each user write only their own records. No system is perfectly secure, but we limit what we collect so there is less to protect.
Your data may be processed on Google servers in India and in other countries where Google operates.
How long we keep data
- We keep your account and game data for as long as your account exists.
- When you delete your account in the app, your profile, leaderboard entries and sign-in account are deleted immediately. Google may keep backup copies for a limited period before they are permanently erased.
- Data stored only on your device is removed when you delete your account or uninstall the app.
Children's privacy
Math Blitz is intended for users aged 13 and above. We do not knowingly collect data from children under 13. If you believe a child has created an account, email us and we will delete it.
Account and data deletion
You can delete your account and all your online data yourself, or ask us to do it.
In the app (instant):
- Open Settings from the bottom bar.
- Tap Delete Account.
- Confirm with Delete Permanently Now. If asked, sign in with Google again to confirm it is you.
Deletion happens immediately and is permanent. There is no waiting period and no way to recover your data. We delete your profile, all your leaderboard entries, the reports you submitted and your sign-in account, and we clear the game records and settings stored on your device.
By email: write to kammarivinaykumar216@gmail.com from the email linked to your account (or tell us your display name for guest accounts). We process email requests within 30 days at the latest.
Your rights
You can ask us to give you a copy of your data, correct it, or delete it. Depending on where you live (for example under GDPR, CCPA or Indian data protection law) you may have further rights. Contact us and we will respond within 30 days.
Terms of Use
- Play fair. Do not use bots, scripts, modified apps or exploits to change scores or ratings.
- Keep it respectful. Display names must not be offensive or impersonate others.
- Score reviews. We may reset scores or remove accounts that look manipulated.
- As-is service. The app is provided "as is" without guarantees. We are not liable for losses arising from its use, to the extent the law allows.
- Changes. We may update the app or these terms. Continuing to use the app means you accept the updated version.
Changes to this policy
If we change this policy we will update the date at the top of this page. For major changes we will also notify you in the app.
Contact us
V Developers
kammarivinaykumar216@gmail.com