[Must Have Eye Protector] This app can cut blue light from your display.
So you can protect your eyes from blue light.
Display of digital devices such as smart phones, has issued a blue light at a rate of more natural light.
Blue Light that will cause a flickering or glare.
In addition, since the energy is stronger than other wavelengths of light, sometimes it is easy cause eyestrain, eye fatigue is the cause of shoulder stiffness Blue Light.