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{| 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).
|+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).
