Earlier this week Apple announced that iOS 9.3 was coming soon and would bring with it better security, a blue light filter, and a new cloud features for iBooks.
The beta version of iOS 9.3 was released to users today, Friday. I've installed it, and I wanted to show you what Night Shade looked like. It's not half as feature-rich as Amazon's Blue Shade or the now-verboten f.lux, but it is not bad for a feature which was conceived and developed in only a few weeks.
You can enable Night Shade from the iOS settings menu, where it is found under "Display & Brightness". (It is not shown on the "swipe-up" function menu like one might expect.)
Here's a gallery of before and after photos taken around 11am local time. As you can see, you can enable Night Shade in the middle of the day if you so choose. That is a feature that Amazon's Blue Shade lacks.
And sorry for the lack of screenshots; they don't show the effect of the filter.
It's difficult to see the difference in the photos, but it is there and soon you too might have it.
According to iDownload blog, Night Shift mode only works on iDevices released in 2013 and later. This includes the iPad Air and later models, the iPad Pro, iPad Mini 2 and later models, the sixth-generation iPod Touch, and the iPhone 5s and later iPhone models.
If you have an older iDevice, then you should check out my post on apps that have this feature.
And if you have an older iDevice which is already jailbroken, they say you can install one of the jailbreak tweaks that serve the same purpose. iDownload published a tutorial on sideloading f.lux on iOS devices that would be a good place to start.
F.lux is the better overall solution because it works system-wide, while the apps can only have an affect while you use them.