I tried using the new function Night Shift of iOS 9.3 which cuts the blue light at night by changing the screen color of iPhone to warm color system - GIGAZINE

Apple held on 21st March 2016 local timeNew product launchThe latest version of iOS "IOS 9.3"Has appeared, and distribution of updates has been started for iPhone / iPad after the end of the recital. As a new feature of iOS 9.3, switching the display color of the terminal to a warm color system at night and cutting the blue light makes it easy to fall asleep "Night ShiftSince it was equipped, I actually tried using it.

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