Bluelight Blocking is a screen filter application that lets you modify the type of light emitted by your smartphone, tablet, desktop computer, and other LED screens. You can choose from four different types of filters: red, yellow, brown, and black. This app lets you adjust the transparency of these filters to the level that you want. For instance, if you want to view your phone's screen with the least amount of blue light, set the filter level to the lowest. On the other hand, if you want to completely block the light, set the filter level to the highest.

To activate one of the filters, you need to click the corresponding button. Then, to view your screen, you need to click the button again to turn off the filter. To save the current value of the filter, you need to click the button once more. This way, you can have a permanent setting for each moment.

To change the filter level, you need to click the slider button. The default value is 100, but you can change it to any value that you want. To access this application more quickly, you can set a shortcut on the configuration menu.