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How to choose and how to play

Schulte grid: numbers are scattered across a grid; tap them in order, 1, 2, 3 and so on, as fast as you can. A wrong tap makes the grid shake and counts as a mistake, but you simply continue from the next correct number. It trains visual search and sustained attention. Faster rounds score more points, so only compare results on the same grid size.

N-back: one position lights up at a time on a 3×3 grid, and you decide whether it matches the position from n steps earlier. The first n positions are watch-only. It trains the hold, compare and update cycle of working memory. Judge yourself mainly by accuracy; matches are relatively rare, so do not guess by habit.

Reading your results: the results screen shows points, accuracy and combo. Single results swing with sleep and mood, so record only your first round each day and look at weekly trends. Make accuracy steady before chasing speed.

Tips: choose Schulte when you have just been scrolling and feel scattered; choose N-back before maths, coding or other tasks where you hold things in your head. One round is enough, then go straight back to your real work. Ads only appear on between-round results pages, never during play. For more, see the practice guides.