Effective date: 2026-10-06 Operator: Team Sunbee (팀선비) · Contact: team.sunbee@gmail.com
Math Flow is a mental-math practice app for Android. This page explains what the app collects, why, and how to remove it. It is written to be read in two minutes.
The app has no accounts. It does not ask for your name, email, contacts, or location.
If Android backup is enabled on your device, Android may include this local data in your Google account backup. That backup is controlled by your device settings, not by the app.
The app uses two Google Firebase services. They receive the following:
| Service | Data | Why |
|---|---|---|
| Firebase Analytics | Usage events (session started, session completed, problem answered, screen viewed, setting changed) and their parameters such as operation, level, score and time in milliseconds; an app-instance ID; device model, OS version, app version, language and country-level location | To see which levels and problem types are hard, where sessions are abandoned, and how often the app crashes, so the ladder can be tuned |
| Firebase Crashlytics | Crash stack traces, device model and OS version, app state at the time of the crash, a Crashlytics installation ID | To find and fix crashes |
Advertising ID collection is turned off in the app. The app shows no ads and uses no advertising SDK.
Google processes this data on our behalf under the Google Privacy Policy and the Firebase terms. We do not sell data and do not share it with anyone else.
Analytics data is kept by Firebase for up to 14 months and then deleted automatically. Crash reports are kept for 90 days.
The app is for general audiences and is not directed at children under 13. We do not knowingly collect personal information from children.
Analytics and crash data: email team.sunbee@gmail.com from any address and include your request. We will ask Firebase to delete the data tied to your app instance. The app-instance ID resets when you uninstall the app or clear its data, which also stops new data from being linked to the old ID.
If this policy changes, the new version is posted at this address with a new effective date. Material changes are also noted in the app’s store listing.
team.sunbee@gmail.com