Note
This project was a workaround to open a basic web browser on the Galaxy Z Flip3 cover screen. It worked by spoofing the Samsung Health package name, since Samsung's widget allow list checked only package names (not app signatures). Because Samsung Health isn't a system app, it could be uninstalled and replaced. Since then, Samsung has patched this, and better official options (such as Good Lock) are now available for running custom apps on Z Flip cover screens.
Proof of concept of custom widgets and apps running on the Z Flip3 cover screen. Adds a widget to Z Flip3 cover screen that lets you launch a web browser-like app on the cover. Play music with Spotify, browse Reddit, watch YouTube.
No onscreen keyboard (yet)
No root required! Note - you CANNOT have Samsung Health installed at the same time as this app.
Install the app APK,
Add the widget to the cover screen in settings,
Close your phone,
Navigate to the widget,
Tap on the blank widget,
Open the phone,
Toggle the widget off and on again in settings,
Reboot your phone,
Navigate to the widget and wait for it to load,
Press 'LAUNCH' twice,
Enjoy! :)