Osram/Sylvania Lightify (it works)

[Sticks18 (Scott G)]

Most popular is @Kristopher Circadian rhythm app that changes the color temp throughout the day to mimic the sunlight.

[OBSOLETE] Circadian Daylight: SmartThings + Smart Bulbs

Use your SmartThings Hub to sync your color changing lights with natural daylight hues [image]GitHub - claytonjn/SmartThingsPublic at Circadian-Daylight Circadian Daylight slowly synchronizes your color changing lights with local perceived color temperature of the sky throughout the day. This gives your environment a more natural feel, with cooler whites during the midday and warmer tints near twilight and dawn. In addition, Circadian Daylight can set your lights to a nice cool white at 1% in “Sleep” mode, which is far brighter than starlight but won’t reset your circadian rhythm or break down too much rhodopsin in your eyes. [image] Circadian Daylight works better with Hue Advanced (Connect)! Special thanks to @juano2310 for working through some of the internal Hue code :), and…

I think Rule Machine has added Color Temp or will soon. That should give you lots of options.

No stock ST apps that I know of. If you have something particular in mind, someone here can probably help you out.