All Virthis apps have the same privacy policy: your data handled by our apps is yours, and remains yours, for the duration of your usage and ownership of the App.
The App will by default store data locally. When it does not, this will always be made explicit to you, and your permission requsted.
If you remove or uninstall the app, all data associated with it will be removed, whether that data is stored on-device or remotely.