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

I paid for this app but after sometime I lost access and customer service doesn't bother to reinstate access. The application itself needs improvement, there many you can buy, don't go for this one; not worth it
Review by Akhile on Einstein™ Brain Trainer Free: 30 exercises to practice your logic, memory, calculation, and vision skills - more effective than sudoku, puzzle, or quiz games.