Multi-touch test - how many fingers does your screen detect?
Counts how many simultaneous touches your screen actually registers - not what the specification claims.
Multi-touch pad
Claimed is navigator.maxTouchPoints; measured is what this pad has actually seen.
- Pinch & rotate
- use exactly two fingers
- distance
- —
- scale
- —
- rotation
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Place two, three, then as many fingers as you can on the pad at the same time.
The record is the most touches seen together during this visit - it depends on how many fingers you use, so it is not the hardware's maximum. Some systems take over three- or four-finger gestures (screenshots, app switching) before the page sees them; if the count stops at three, try with those gestures turned off.
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The number that matters is the one it delivers
Your device reports a figure through navigator.maxTouchPoints — usually 5 or 10 — but that is what the digitiser advertises, not what it manages. This counts the pointers that actually arrive while your fingers are down, and keeps the highest number seen.
The peak is kept deliberately, because it disappears the instant a finger lifts. A test that reported the count at the moment you pressed Done would report whatever you happened to be holding at that second.
Why it matters
Two simultaneous points is the floor for anything useful: below that, pinch-to-zoom does not work and two-finger scrolling is unreliable. A screen that manages one point is a screen with a real fault, even though single taps feel normal.
Games and music apps use more — four or five for on-screen controls, sometimes ten. If a device is being bought for that, the peak here is the figure to check.
How to run it
Place as many fingers as you can on the pad at once, hold them for a moment, then lift. Try both hands. Spread them out: some panels handle several touches well when they are far apart and merge them when they are close together, which is itself a fault worth knowing about.
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Touchscreen test finds dead zones; the full device health check includes both alongside everything else.
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Quick answer
Place as many fingers on the pad as you can at once, then lift them. The highest number seen is kept, because the peak disappears the moment a finger lifts. Two points is the minimum for pinch-to-zoom to work.
Key facts
- Reports touches actually delivered, not the advertised maximum
- Two simultaneous points is the floor for pinch-to-zoom
- Peak is retained after fingers lift
- Spread fingers apart - some panels merge close touches