Undervein — Privacy Policy
Last updated: 27 July 2026
This policy describes how the iOS app *Undervein* (地脈) handles information.
1. What we collect: nothing
The app collects and transmits no information at all.
- No name, email address, or any other contact detail
- No accounts, no sign-in
- No access to contacts, photos, camera, microphone, location, or any other data behind an iOS permission prompt
- No advertising and no advertising identifier (IDFA)
- No analytics or measurement tools, and no usage data
- No tracking, and no App Tracking Transparency prompt
The app performs no network communication.
2. Saved games
Your progress, records, and settings are stored only on your device. They are never sent anywhere. Deleting the app deletes them.
3. Children's privacy
The app collects no personal information from users of any age.
4. Changes to this policy
If a future version begins collecting anonymous usage data, we will update this page, say so inside the app, and provide a way to turn it off at the same time.