Using phones or tablet for a long time leads to eye strain and affect your sleep, Screen Filter is a free app used to reduce blue light by adjusting the screen to natural color. Shifting your screen to night mode can relieve your eyes strain, and your eyes will feel at ease during night reading. Also, Screen Filter will protect your eyes and help you sleep easily. Screen Filter is good for reading at night, gaming, or any long time usage. Features: ● Reduce blue light. ● Easy to use, just one