Hand Steadiness Test
Measure how steady your hand is.
- Hold your phone in one hand.
- Tap “begin test” below.
- As it counts down, stretch your arm straight out in front of you, unsupported.
- Hold it as still as you can.
· awaiting test
· tap to start
What this measures
This is a steady hand test. You hold your phone still for ten seconds and its built-in motion sensors record how much your hand moves. The steadiness score comes from how far the on-screen ball drifts from center and how much it jitters from one frame to the next.
A steady hand is something a lot of people care about — surgeons, dentists, musicians, archers, artists, gamers, and anyone simply curious how steady theirs is, or how it shifts with caffeine, sleep, or focus. This puts a number on it in ten seconds.
It's a technical experiment, not a medical device: it reads motion from your phone's accelerometer and nothing else. Curious about the method? See how it works.