Screen Touch & Dead Zone Test
Online touchscreen testing tool featuring grid drawing coverage, multi-touch radar tracking, and touch responsiveness tests.
Grid Paint Dead Zone Test
Divides the screen into a dense grid that lights up when swiped. Perfect for inspecting second-hand phones, screen replacements, or screen protectors.
Multi-Touch & Contact Area Test
Renders real-time contact ellipses and coordinate tracking for every finger, monitors refresh and touch sampling rates, and logs max multi-touch points.
Edge Calibration & Limit Test
Expands a central rectangle outward by swiping to test for touch dead zones along the extreme physical edges of the display.
Touchscreen FAQ & Knowledge Base
What are Dead Zones and Touch Drops?
Touch drops refer to unexpected signal disconnections while sliding a finger across the panel, while dead zones are specific screen areas that fail to respond to touch. Common in second-hand devices, repaired screens, or poor-quality glass protectors.
Screen Refresh Rate vs. Touch Sampling Rate
Screen Refresh Rate (Hz) measures how many frames the display updates per second, while Touch Sampling Rate (Hz) measures how frequently the touch controller scans for finger input. Higher sampling rates provide smoother tracking and lower input latency.
How to perform an effective screen test?
We recommend launching the 'Grid Paint Test' with a fine mesh density and swiping smoothly across the entire display, followed by the 'Edge Calibration Test' to check extreme bezel boundaries.