Privacy Policy

App: MathNotes (com.zgt.mathnotes)
Effective date: 2026-08-01

In one sentence: this app does not collect, store, transmit, or share any of your data. It does not even have internet permission.

1. What we collect — nothing

MathNotes requests zero Android permissions, including INTERNET. It is therefore technically impossible for the app to send any information off your device. We collect no personal data, device data, analytics, crash logs, advertising identifiers (no ad SDKs), or location data.

2. Where your notes are stored

All notes are stored only in the app's private directory on your device. If you enable Android system backup (Google One backup), the OS may back up your notes under Google's own encrypted backup mechanism, which the developer cannot access.

3. Third-party services

The app contains no third-party SDKs (no ads, no analytics, no crash reporting). It collects no data.

4. Children's privacy

The app is not designed for children under 13 and collects no data from any user, including children.

5. Data deletion

Uninstalling the app deletes all local data. Since we never receive your data, there is nothing to delete on any server.

6. Changes & contact

If the policy changes, we will update this page and revise the effective date.
Contact: kefu@jujumi.com.cn · Website: jujumi.com.cn

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