Iris is described as 'Reduces blue light and adjusts screen brightness without flicker, offers auto color temperature, customizable modes, manual settings, overlays, and color effects for eye health and comfort' and is a color temperature tool in the office & productivity category. There are more than 100 alternatives to Iris for a variety of platforms, including Mac, Windows, Linux, Android and iPhone apps. The best Iris alternative is f.lux, which is free. Other great apps like Iris are Mindful : Focus & Screen Time, Stretchly, Redshift and Workrave.