Darker can lower your screen brightness to extremely low levels , to help prevent eyestrain during the night. Use the integrated color filter to adjust the color of your screen, ideal for filtering hard white backgrounds during the night.
Users can upgrade the free version of Pro through in-app purchase or buy directly this version (for countries that do not support in-app purchases) – the two are identical in terms of functionality .
+ Run at startup
+ When the brightness is below 20 %
+ Darken navigation bar
+ Colors of custom filters
For More Info Google Play