About PYPL STELLAR

Reaction time: how fast you respond to a simple visual change.
Memory under pressure: short tests that reward focus and consistency.

A free reflex and reaction time testing app where you play mini-games to measure your speed in milliseconds.

What we measure

For the most fair tracking, compare scores on the same device and browser.

Quick, simple, and great for a baseline.

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See averages, then follow a plan to improve.

Average reaction time Improve reaction time