{| class="wikitable" |+Comparison of color filter software !Name !OS support !Automated? !Note |- |SunsetScreen |Windows |Yes |[https://www.neowin.net/news/sunsetscreen-128/ last full free version] |- |F.lux |Windows, Linux |limited |[https://justgetflux.com/faq.html faq link] |- |Redshift |Linux(X11), Windows(limited) |Yes |[https://wiki.archlinux.org/index.php/redshift#Configuration configuration last full free version] |- |iOS&macOS native feature |iOS, macOS |No |[https://www.skyatnightmagazine.com/advice/how-to-turn-your-iphone-screen-red-for-astronomy/ tutorial] |- |NegativeScreen |Windows |No |[https://zerowidthjoiner.net/negativescreen free download] |} For all of these software packages, you should change the color temperature to the lowest possible usable value (1000K for redshift, 800K for f.lux).
For all of these software packages, you should change the color temperature to the lowest possible usable value (1000K for redshift, 800K for f.lux).