I have just created my first Android app. It is a simple game, called Single N-Back. It has been shown in multiple studies that this game can improve your fluid intelligence.

You can get it here:

Game Rules

The game rules are very simple: You are shown a sequence of numbers and your task is to click the button if you see the current number matches the one from N steps earlier in the sequence.

For example, in 2-Back, when you get the sequence

5, 3, 0, 4, 2, 8, 9, 1, 9

You should press the button because the currently showen numer 9 is the same as the number shown 2 steps back.

You start with 2-Back, and if more than 80% is correct, you can unlock the next N-back level.

Screenshot

Here are some screenshots of the extremely ugly clean user interface:

References

Since I have not made this test up by myself, here are some papers that explain the validity that that kind of game actually improves fluid intelligence:

Have fun!

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