Night Light

• Preinstalled in Windows 10 Creators Update

Review based on Reddit

• doesn’t show the temperature value on the color slider (i.e. in Kelvins)
• requires the system’s location service to be enabled and used frequently in order to function properly
• the transition to nighttime colors isn’t as gradual and smooth as it is when using f.lux
• Doesn't start automatically on startup

• Portable, Customizable and More Control than f.lux
• Not User Friendly

• Open Source
• Not User Friendly, Portable version has issues on Avast Antivirus

• Most Popular Eyestrain Apps and User Friendly
• Portableapps version available