Touchscreen Response Test
This test records touch events delivered by the browser on phones, tablets and touch monitors. It helps observe regions without events, unexpected contacts and apparent simultaneity.
Open tool fullscreen →Interface and local controls remain in Portuguese.
How to use
- Tap and drag your fingers across the entire screen area to paint the grid cells.
- If any cell remains unaffected, you have found a potential digitizer dead zone.
- To test the multi-touch threshold, press multiple fingers simultaneously until the counter stops registering.
When to use
- Repeatably mapping where the browser received contact.
- Comparing behavior before and after a protector, setting or repair change.
- Recording unexpected events while the device remains untouched.
- Observing the maximum simultaneity exposed in this session.
Limitations
Results depend on browser APIs, the operating system and reserved gestures. They do not measure electronics, identify a cause or confirm the digitizer’s physical maximum.
Frequently Asked Questions
- Why does my "10-point touch" phone only log 3 fingers here?
- The operating system, browser and global gestures may intercept or group contacts. The counter only shows events exposed to this page in that attempt.
- Does this test confirm my screen is broken?
- No. It shows where the page did or did not receive events. Repeat the test and rule out software, protectors, moisture and settings before seeking hardware service.
Technical Methodology & Display Science
A capacitive digitizer is a transparent mesh overlay on top of the LCD or OLED panel. It creates an electrostatic field that deforms upon contact with a conductive object.
The native browser Touch Events API translates hardware interactions into DOM events (`touchstart`, `touchmove`, `touchend`). MonitorSmith tracks the individual lifecycle of each active finger.
Missing or unexpected events are symptoms only. Repeat under different conditions and consult technical support before assigning a physical cause.