It’s not rocket science, but it’s still a blast! One of the simplest puzzle games in all the app store, Flow Free is a devious little game that challenges you to connect dots of the same color by connecting lines in a grid without crossing. It’s one part connect the dots and one part mensa test.
The premise is simple; you start Flow Free by connecting three or four matching dots in a 5×5 grid but then time and space melt away and you’ll soon be connecting up to 10 pairs in a 9×9 grid.
The first 450 puzzles are literally free, so you’ll be thoroughly addicted before having to shell out the four bucks for more levels.