What is the Underground Music Showcase application, how does it work?

According to the introduction of Underground Music Showcase, Underground Music Showcase is a Events app on the Android platform. There is currently a 1.0 version released on Jan 23, 2020, you can see the details below.

The UMS app is totally new this year, with a focus on who is playing when and where, and a personal schedule just for you! Save your favorite bands, see a list of who’s playing next, and enjoy the show.

What's new in version 1.0 Pu the app in an 'offseason' mode