A casual screening test, not a medical diagnosis. Find the number hidden inside a circle of colored dots to get a quick read on possible red-green color blindness.

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pts

Mental Math

Solve as many arithmetic problems as you can in 25 seconds. Correct answers earn +1 point, wrong answers cost −1.

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cpm

Typing Speed

Type the sentence shown on screen as fast and accurately as you can. Measures your typing speed in characters per minute (CPM).

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hits

Aim Trainer

Click as many randomly appearing circles as you can before time runs out. Measures the number of targets hit.

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cpm

Typing Practice

Type the sentence as quickly and accurately as possible.

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correct

Stroop Focus

Choose the ink color rather than the word meaning.

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What tests can I take?

Seven free online tests — reaction time, click speed, memory, color blindness, mental math, typing speed, and aim training — all playable instantly with no sign-up required.

How do the rankings work?

Sign in and save a result to be automatically registered on that test's leaderboard. The more tests you do well in, the higher your Overall Score climbs.

How do I compare my results?

Every result page shows your percentile and the average score among all participants, and you can share a link to your result to compare directly with friends.