The basic features of Bluelight Filter for Eye Care let you set the filter's opacity level and color. The default level, 30%, will make your eyes less tired, but also makes the screen darker. With a higher percentage you'll tire your eyes even less, but at the expense of a having a much darker screen.
Although the default filter color is blue, Bluelight Filter for Eye Care lets you change it to several others, like red or yellow. You can also activate the filter from the status bar, or choose to launch it at startup.
Bluelight Filter for Eye Care is a good app if your vision often gets tired from looking at your Android screen. Give your eyes a break using this nifty app.
Requires Android 2.3 or higher