If your Android continues to show the System UI has stopped error, repeat steps 1-4. Fix #10: Perform a factory reset.

If your Android phone has its own dedicated System UI app, you can clear its cache by following these steps: On your Android device, navigate to the Settings app. In the Settings menu, scroll down ...

Another popular reason why System UI crashes on your smartphone isn’t enough storage space on your smartphone. When your Android smartphone runs out of memory, you may experience performance ...

Wear OS System UI is also available as a watch face on the Play Store. It is another first-party Google app for the Pixel Watch to get a watch face. A recent update for Google Photos added one too.