Figure out app algorithm

So there’s an app that I use to play to with my family every weekend (on apple and play store). I started trying to figure out the algorithm behind it in fun. But now I’ve become almost obsessed with figuring it out. I can’t for the life of me but I’m also not experienced in algorithms, I’m sure someone who is could figure it out quickly. Unsure of this is allowed but if so please reach out I’d like to figure it out ASAP and stop racking my brain. It’s a free app, I just want to understand it.