What is the application for separate account management in a cafe?

Question

Android

Tell me an application for maintaining separate accounts in cafes and similar establishments. So that during the gatherings, write down who takes what, and at the end count how much money from whom. Tired after gatherings for another half an hour to sit and calculate.
Preferably on android.

Answer 1

Found one https://play.google.com/store/apps/details?id=com.... but it must be constantly in the background, otherwise you have to re-enter everything

Answer 2

Not quite for accounts, but quite convenient in https://play.google.com/store/apps/details?id=de.s... it is not necessary to keep it in the background, it automatically saves the result.