Minor improvement.
Allow remove ads by IAP.
This app draws a translucent mask over screen,
it can :
* Block blue light, for your health.
* Dim screen at night, feel comfortable.
Similar to iOS Night Shift.
Blue light is bad for health, learn more:
www.bluelightexposed.com
https://en.wikipedia.org/wiki/High-energy_visible_light
www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side
Terms of Use:
http://diaohs.com/legal/terms
