Blue light from the phone is a cause of eye fatigue. It disturbs your sleep and harms your eye health. The night shift function has been scientifically proven to reduce blue light. By adjusting the screen to soft light, it relieves eye fatigue, helps you sleep well and improves your vision health. 100% FREE and effective for eye care! Features √ Night filter shifts your screen to natural warm light √ Help you gain one more hour of sleep √ Protect your eyes for 24 hours with the auto-timer √ He