Blue Light Blocker Iphone App. 4.3 out of 5 stars. A free blue blocker test for light sensitivity with an app (more below).
Adjust the settings on this menu to schedule or enable night shift. Alternatively, look in settings > display > blue light filter.
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An app that reduces the amount of blue light emitted by overlaying a translucent filter. And every iphone comes with an app called night shift that lets you filter out blue light.