Iris is one of the best programs that allows you to fully control the types of rays emanating from the computer screen, which are blue rays and the brightness and brightness of the screen. It also contains a timer to alert you to take a rest and rest your eyes in a pre-determined period
The version is originally paid and gives you a 7-day trial period, but you can get a month for free for each person who downloads the program from your link
And automatically, the link that I will put to download the program will give you a free month.
Download link (the official website of the program)