How to use
- Open full screen for a clean test area.
- In draw mode, put several fingers down at once to read the simultaneous touch count.
- In grid mode, swipe over every cell. Cells that do not fill point to a dead zone.
- With a stylus, the pressure value shows if pressure is reported.
Frequently asked questions
How many touch points should a phone support?
Most phones and tablets report 5 to 10 points. The reported maximum comes from the device; the measured maximum is what you actually reached.
Some cells never fill.
Try again slowly. If the same area always fails, the digitizer may be damaged there. Screen protectors with bubbles can cause the same effect.