Bluelight Filter

is a tiny ad-free utility (just 0.2mb!) to reduce blue light emitted by smartphones, tablets & Chromebooks.
To understand the effects of blue light please refer to:
https://en.wikipedia.org/wiki/Effects_of_blue_light_technology
✓ Multiple filters with different tints
✓ Edit/add filter colors to suite your mood
✓ Half screen preview of the filter
✓ Full range of opacity levels to dim the screen
✓ Timer to Auto ON/OFF at preset times
✓ Easily toggle on and off from status bar
✓ Quick access screen widget button
✓ Night mode black filter
✓ Ad-free (no ads) & no special permissions
✓ Tiny (0.2mb only) but full-featured