What is the 3. Liga application, how does it work?

According to the introduction of XOOPsoft, 3. Liga is a Sports app on the Android platform. There is currently a 2.159.0 version released on Jan 05, 2020, you can see the details below.

Standings, Livescore, Fixtures, and more...

Fast Live Score push-notifications. Settings lets you turn on and off notifications.

Support for Android Wear with live score notifications.

The tournament schedule has the complete schedule.