asif i
asif i reviewedf.luxAdjusts your computer's display to adapt to the time of day
 RecommendedPros: 

Easy to set up

Cons: 

Works well with external displays on Macs, but not on Linux

I have been using this since it first showed up on Product Hunt. It's probably my most used 'app' even though I barely ever interact with it. Once I found my optimal settings, I don't think I've opened the app itself more than a handful of times. It works as advertised most of the time. The only time I've had issues is when using it on external displays with Linux. Since it's my secondary device, it's not been much of a problem though.