Custom Setup on Android

hi, I am a beginner to chess and new to this site. I am trying to implement some of what I am slowly learning, and much of that involves setting up a custom situation and then playing against a computer. I am primarily using my android phone to train. I have the chess.com app, and was wondering if this or any other app has the capability of setting up a custom situation and then having the computer play it out against me. Any advice would be helpful! Thanks!

There are a lot of other android applications that allow you to do this ... you don't have to rely on chess.com for everything. Examples would be :Chess Genius, Shredder (both are paid .. but I'm sure there are free ones out there as well)