They say that blue spectrum of light isn't good for the eyes, especially at night when you’re more likely to be looking at your phone in a dark environment. This also supposedly leads to poor sleep, which leads to poor health. Here’s how to combat that on your Android phone. On desktop computers, you can use an app called f.lux. On iOS devices, you can use the new Night Shift feature. Both these features give your screen a red tint to remove the blue light spectrum from your display, making it easier on the eyes in dark environments. It can be a little jarring at first, but it doesn’t take long to get used to it. And once you’ve adjusted, it’s actually pretty nice—I personally find it to be incredibly soothing to look at. The thing is, many Android devices don’t have a built-in night mode feature—we’ll cover the ones that do down below (as well as a workaround for devices running Android 7.0). But fret not, for everyone else, we also have a few third-party options. Pixel Devices: Enable Oreo’s Night Light Feature If you’re sporting a Pixel device, you’re in luck. Google tossed in a feature called Night Light that was actually available out of the box in Android 7.1 (but again, only on this particular phone). With Oreo, a few new tweaks were added, so we’re just going to cover the feature in its current state. To access Night Light, go ahead and pull the notification shade down, then tap the gear icon. From there, scroll down and tap on Display. The second option in this menu should be “Night Light.” Go ahead and jump in there. At this point it’s all pretty straightforward. You can set Night Light to turn on automatically—a setting I recommend using—or just toggle it manually. I prefer the “Sunset to Sunrise” setting, because it automatically adjusts as outside light does, which is great. You can also set a custom schedule if you like. Otherwise, once Night Light is on, you can tweak the intensity using the slider in the Status section. This setting will stick from that point forward, and if you ever want to adjust it, just jump back into this menu. Galaxy Devices: Enable Samsung’s “Blue Light Filter” Samsung has its own night mode setting on modern Galaxy devices like the S8 and Note 8. It’s actually called “Blue Light Filter,” which is technically correct but far less intuitive. Anyway, give the notification shade a tug, then tap the gear icon. From there, tap into the Display menu and look for the Blue Light Filter setting. While there’s a simple toggle to turn it on or off directly from this menu, the real settings are found within. Go ahead and tap the text to jump in. Like on the Pixel, you can set this up to turn on automatically; again, either on a custom schedule or from sunset to sunrise. I still prefer the latter. Also like on Pixel devices, you can set the intensity, though on Galaxy phones it’s referred to as Opacity. Six in one hand, half a dozen in the other—it’s all the same thing. And that’s really all there is to it. Nougat Devices: Enable Android’s Hidden Night Mode Note: This was disabled in Android 7.1, so it only works in 7.0. Nougat’s “Night Mode” was originally hidden in the System UI Tuner during the beta, but it was removed in the final version. The menu still exists, though–you just can’t access it as easily anymore. First, you’ll need to enable the System UI Tuner. If you’ve already done this, skip down a little bit. Pull down the notification shade twice, then long-press the cog icon. After a few seconds, you can release and it will spin. A wrench icon will then show up beside the cog, indicated the UI Tuner has been enabled. I hope this helps.