Vietnamese Calendar ("the app") is made by KF Production. This policy explains what the app does with your information. In short: there is no account, your settings stay on your device, and we run no servers that receive them.
What stays on your device
The holiday and calendar data is built into the app. Your settings, such as language and weekend days, are stored only in the app's own storage on your device. We cannot see them.
Your calendar (optional)
If you allow calendar access, the app reads the events in your own calendars (title, date and time, and calendar name) to show them on the matching days. Holiday and subscribed calendars are skipped. Events are read on your device while the app shows them; the app does not store them or send them anywhere.
The app does not change your calendar by itself. "Add to calendar" opens your calendar app with a new event on that date, and you decide whether to save it. You can turn calendar access off at any time in the system settings.
Advertising
The app shows ads from Google AdMob. The AdMob SDK may collect your device's advertising ID, IP address (which gives an approximate location), and information about ad interactions and app performance, to serve and measure ads and to prevent fraud. Google may use this information to show ads based on your interests. See how Google uses this information: https://policies.google.com/technologies/partner-sites
You can reset or delete your advertising ID in the system settings.
Nothing else is sent
Apart from ads, the app makes no network requests of its own and contains no analytics. "More apps" in Settings opens Google Play.
Device backup
Android's own device backup may copy the app's settings to your Google account, if you have device backup turned on. This is handled by Android, not by us.
Children
The app is not directed at children under 13.
Deleting your data
Clear the app's storage or uninstall it to remove everything it stored on your device. We hold no copy to delete.
Changes
If this policy changes, the new version will be posted at this address with a new date.