Test phone touchscreen response online by filling a touch grid. Free, no app or sign-up.
Sweep your finger through every grid square. Repeat any missed area after cleaning the screen and checking whether the protector or a system gesture interferes.
This samples browser input. It does not test pixels, prove originality or guarantee that every physical edge works. A mouse cannot verify phone touch response.
No device permission is required.
Results are saved only in this browser for up to 24 hours. This single test does not replace a complete used-phone inspection.
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