Einstein – Einstein™ Brain Trainer HD Free: 30 exercises to practice your logic, memory, calculation, and vision skills - more effective than sudoku, puzzle, or quiz games Review

I just got this yesterday and have already told friends about it. I wanted a challenge , I got it. Will probably purchase soon.
Review by Grannie Karon on Einstein™ Brain Trainer HD Free: 30 exercises to practice your logic, memory, calculation, and vision skills - more effective than sudoku, puzzle, or quiz games.