Most of us are "attached" to smartphones - those technological wonders that make almost every person look at them over and over again: at work, in bed, in the subway, in airplanes, cafes, everywhere. Besides all the good they bring to the world, smartphones also have the ugly power of tiring our eyes and keeping us from sleeping well. This happens mostly because we use our smartphones and look at their screens right until we fall asleep. That's not good because the blue light their screens emit affects our circadian rhythm and impairs our ability to fall asleep. Unless you plan on not using your Android smartphone or tablet for a few hours before you go to bed, a solution to reduce the harmful effects of the blue light emitted by it is to install and use an app that filters it. We tried some of the most popular Night Light apps for Android. Here are those which we consider the best:

1. Twilight (Blue light filter for better sleep)

One of the best "night light" apps you'll find in the Google Play Store for filtering blue light is called Twilight. To block the blue light emitted by your Android smartphone or tablet, it applies a red filter over your screen. Additionally, it can also dim the screen brightness to reduce the strain on your eyes even more. The filter can be applied automatically at night, you can schedule it during the times you choose, and you can also turn it on or off manually. If you choose to automatically enable the filter at night, Twilight can do that based on your local sunset and sunrise times, which is excellent.

Download: Twilight (Blue light filter for better sleep)

TIP: If you don't know how to open the Play Store on your Android smartphone, read: 5 ways to open the Google Play Store on Android.

2. sFilter - Blue Light Filter

sFilter - Blue Light Filter is yet another popular "night light" app that lets you turn on a blue light filter manually, whenever you feel you need it. Furthermore, it also allows you to set a schedule for turning the blue light filter on and off at manually specified times. The app supports various color filters that you can select depending on your preferences, as well as controls for opacity and brightness levels.

One thing that we appreciated and we're sure many of you will do too is the fact that sFilter - Blue Light Filter also has a widget that you can use to quickly turn the filter on or off. The widget floats on top of everything else you might have on your Android's screen, so you don't have to switch apps to enable or disable the "night light" mode.

Download: sFilter - Blue Light Filter

TIP: If you don't know how to install apps from the Play Store, read: How to use Google Play Store to install apps and games for Android

3. Blue Light Filter - Night Mode, Night Shift

Another good alternative that can limit the blue light emitted by your Android smartphone or tablet is Blue Light Filter - Night Mode, Night Shift. It can dim your screen's brightness and apply a screen filter that changes the colors displayed into colors that feel more natural. In fact, you can even choose the type of natural light that you want the app to use: Night shift, Candlelight, Dawn, Incandescent Lamp, Fluorescent Lamp, or Sunlight. Of course, you can also adjust the filter intensity manually if you prefer.

Download: Blue Light Filter - Night Mode, Night Shift

TIP: If you installed one of the apps recommended in this article and you don't like it, here is how to remove it from your smartphone: 4 ways to uninstall apps on Android.

4. Bluelight Filter for Eye Care - Auto screen filter

Bluelight Filter for Eye Care - Auto screen filter is a simple "night light" app that doesn't dim your screen's brightness to protect your eyes. It only changes the colors displayed to warmer ones, with less blue. It can be turned on and off manually, you can adjust the intensity of the filter applied, and you can also choose to use one of the seven predefined filter colors.

Download: Bluelight Filter for Eye Care- Auto screen filter

5. Bluelight Filter - Night Mode

Possibly the most straightforward Android app designed to fight blue light, the Bluelight Filter - Night Mode app does what it says and nothing more. It offers five different filter colors, and you can use a slider to increase or decrease the filter intensity, but that's about all there is to it. No automation options, no screen dimming, and, unfortunately, half a screen of ads, if you use the free version. However, it's easy to use, and it works well, so it's a better option than other "night light" apps.

Download: Bluelight Filter - Night Mode

6. Night Owl - Screen Dimmer & Night Mode

Night Owl - Screen Dimmer & Night Mode is an Android app that, in order to reduce the blue light emitted by your device, dims the backlight of the screen and also applies a color filter on it. It can be turned on manually as well as automatically based on a schedule of your choosing. It is able to turn on automatically at night, using the sunrise and sunset times of your location, but, unfortunately, this is a premium feature available only if you buy the app.

One thing that we found interesting is the fact that it offers you the option to use an "advanced filter," meaning that you can manually choose the red, green, and blue colors values of the "night light" filter.

Download: Night Owl - Screen Dimmer & Night Mode

7. The Night Light mode that's built-in on your Android smartphone

Last but not least, there's also the built-in option that most smartphones running Android 7 Nougat or newer have. Android uses Night Light as the name for its blue light filtering feature but some manufacturers like changing names, so you might find it labeled as Blue Light Filter, Comfort View, Night Mode, Eye Care, Night Display, etc. To find it on your Android, open the Settings and navigate to the Display settings. If you don't see it there, try to use the Search to find one of the "night light" terms that we've mentioned.

For example, on my Huawei P20, the built-in blue light filter options are found in Settings -> Display & brightness -> Colour & eye comfort -> Eye Comfort -> Blue Light Filter. There, I can enable or disable the "night light" mode manually, set a schedule for when it should turn on and off automatically, as well as adjust the color temperature used by it.

Do you use a night light app to filter blue light on your Android?

The apps we recommended for you in this article are all good at their job. They are all able to limit the amount of blue light emitted by your Android smartphone or tablet. However, some of them offer more options and settings than others. We believe you will find one that is perfect for you. Try them out and keep the one you like best. Then, share your choice with us in the comments below.