The VG Resource

Hi, I'm pretty new to the 3d model ripping scene. I recently got into it to attempt to help document some games I love that have little to no documentation in the US. 
One of the games I want to rip is a mobile game that had their game servers shut down a while ago. So I managed to successfully download the latest APK file of the game, "Yokai Watch Kunitori Wars" and now I'm trying to figure out if there is a preferred program that I can use if I don't know what the game engine is. 
I've seen both the Unity one and the Ninjaripper as viable options, but I was wondering if there was a better suggested one to see if I can use.

Any help or advice would be greatly appreciated! ^^

Hey - just FYI, there's a Yo-Kai Watch ripping thread here. Don't know much on that game specifically - I only work on the 3DS games.

I would say use Assetstudio would be your best bet if the game runs on Unity
Doesn't Kuntori Wars have assets it has to download from the internet? (Due to the content in the game at least, I'm assuming this is just mobile Sangokushi)
In that case I'm worried you might have to root your device to get the proper files. Or worse, it could be a Puni Puni case where the game will delete and/or ban your profile entirely if it knows you've been poking around files.