The UI is what you see on the screen and interact with either by touch or with knobs and dials. Poor design by carmakers here can create a confusing user experience … and is often the source of user frustration. Andrew Del-Colle
Google Duo started as a simple video calling app which, as it's gotten more popular, has also integrated many new features. Now, it appears Google Duo is testing an updated UI for calls which places functions along a bottom bar. Ben Schoon