Press the surface with one or more fingers to map your touchscreen: how many points it tracks at once, where its dead zones are, how hard you press, and how fast it reports. Everything runs locally; nothing is recorded.
Device
reading…
What the browser reports about this device's pointer hardware.
Reported max points
—
Primary pointer
—
Hover capable
—
Pointer types seen
none yet
Pressure reported
unknown
Screen · DPR
—
Touch surface
idle
PointsTrace · dead zonesPinch & rotate
Touches now
0
Max at once
0
Points seen
0
Report rate
0 Hz
Touch here with one or more fingers
Use several fingers at once to see how many your screen tracks. Go fullscreen to reach the edges.
How to read this
Max at once is the most simultaneous fingers detected. Many modern phones and tablets handle 10; budget or older screens often cap at 2–5. The browser or OS can limit this below the panel's true capability.
Trace mode leaves a trail wherever you drag. Slowly sweep the whole surface — especially edges and corners — and look for streaks that drop out or jump. Those are dead zones or digitizer faults. Fullscreen lets you reach the real screen edges.
Pressure and contact size are only reported by some devices and browsers. A flat 0 or 0.50 pressure means your device isn't sending real force data, not that the screen is broken.
Report rate is how often the browser delivers touch updates (it uses coalesced events where available). It reflects the event/sampling rate, not true hardware latency — which a browser can't measure directly.
Nothing here is uploaded. All detection happens on your device.