I play three games on my phone consistently.
In terms of time, the top two are Shproty and Antiyoy. I’ve been playing Antiyoy since 2017, and have ported it along between phones ever since. It’s a hex-map, turn-based stategy game. Shproty just came out, and it’s a puzzler. You fit shapes into bigger shapes and obey certain rules.
The other one is Exponential Idle. It’s a pure math incremental game, but it seems to be done. If I had more time, I’d make a custom theory, but alas.
I also play, ‘Suppose I win the lottery and could buy a house. Where would I move in Denver?’ But that’s not nearly as rewarding.