Cell to Singularity on the surface is a fun idea. You start by creating the world, slowly add different things like amino acids until you create simple life forms and eventually work your way up to bigger things like fish and such. In reality, you are just playing a tap game like any other. hit the screen to earn currency faster, buy things to make you earn it faster when you tap or are idle and when you set your phone down spend what it makes while you are away.
I’m not bashing that style of game, some of them are really well done and quite addictive. This for me was not one of them. It is free to play so it may interest some of you, but the game is more of the same and to me is done much better elsewhere. Best wishes and may the gaming gods bring you glory.