Defective pixels, also known as electronic device defects, can be detected on the screen when viewing images/applications/movies.

This application allows you to reveal 2 types of damaged pixels: permanently or non-permanently burned pixels.
  The control is done on 8 colors:

black,
red,
green,
blue,
cyan,
magenta,
yellow,
white RGB, CMYK and white color spaces.

INSTRUCTIONS:

1) Carefully clean the phone screen with a cloth or a soft cloth, or a napkin, from dirt, dust, grease stains and more;
2) Start the application;
3) Just swipe left or right to switch to the next color or previous color;
4) On all colors a monochromatic screen is closely observed at all points. All screen pixels must be one color. If the color of the pixels is different on any color, this pixel is burned.