✨ Firefly Catcher
A quick check of alertness and mental fatigue
How to play
- Watch the sky. A firefly will appear at random moments.
- As soon as you see it, tap anywhere (or press Space).
- Don't tap early. Waiting is part of the game!
How tired do you feel right now?
Test length
Longer tests are better at revealing fatigue. Find a quiet spot and silence your notifications.
This is a wellness indicator, not a medical test. Your results stay in this browser unless you choose to save them.