Retro Number is a free and simple application for Apple Watch and iPhone.
It contains four kinds of games that train your brain.
Let’s try and improve your intellectual ability.
-Couple
Tap the same numbers as fast as you can.
-Flash
Memorize the randomly placed numbers in 5 seconds.
-Reflex
Just tap the numbers from 1 to 9 in order as fast as you can.
-Line
Swap and align the same three numbers vertically, horizontally or diagonally.