A free program for Android, by Robust Programmer Inc.
Blue Light Filter – Eye care is a free and easy-to-use application for the Android platform that provides a means for reducing the amount of blue light that comes from the phone screen and helps users to have a better night’s sleep.
How can I download and use it?
To download and use the Blue Light Filter – Eye care application, you need to install the Android operating system on your device, and you need to have an Internet connection.
After installing the application, you need to enable the application in the settings, and then you can use it.