We will not store any image or settings.
All data will be processed on your device, not our server.
If you have concern about it, you can open the web app then turn off your internet connection.
The app should be still available without any internet connection.
Of course, you can also review our code on the repository.
We use Google Analytics to monitor website traffics.
Google Analytics may colloect anonymous data and set cookies on your device.
If you have any other questions, welcome to open an issue on this repository's Issues Page.