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What Is The Blue Light Filter On Android? Which App Works Best?

How often do you get a good night’s sleep? If the answer isn’t “always,” consider how your gadgets impact your night’s sleep. The blue light emitted by screens tricks our brains into thinking we should be awake. Luckily, you can easily fix this problem by using a blue light filter on your Android phone.

Blu-ray Problem

The blue light emitted by screens has been shown to affect your health. A Harvard study has repeatedly warned that using electronic devices at night can affect the quantity and quality of sleep.

The reason is exposure to light at night. More specifically, it involves exposure to short-wavelength blue light—like the light emitted by phones and tablets and nearly any device with a backlit display.

Sunlight also contains blue light, which is necessary for life during the day. It helps keep you awake and alert and is an important part of how the sleep cycle works.

But exposure to blue light at night can have negative effects because it effectively tricks your brain into thinking it’s still daytime. As the NHS explains, it suppresses the production of melatonin, a hormone produced at night that helps the body prepare for sleep.

The impact is so great that another study published by the Daily Mail even suggested that glowing blue LEDs on car dashboards would be an effective way to prevent drivers from dozing off at the wheel.

So, what else can you do besides turn off your phone a few hours before bed? The answer is to use a blue light filter. This feature is already built into Android, and some third-party apps can provide more functionality if needed.

What Does a Blue Light Filter Do?

Blue light filtering works in two ways. We’re looking at built-in and root options that can reduce the amount of blue light emitted by your screen. Other third-party apps place red filters on the screen to suppress blue light.

The effect is the same. It gives everything a red tint which takes some getting used to. But it also eliminates the negative effects of blue light and massively reduces glare. Even if you’re skeptical about improving your sleep, you’ll immediately notice less eye strain when you use your phone in a dimly lit room.

However, third-party apps aren’t perfect. Using a red overlay reduces contrast and turns blacks into deep reds.

You can also trigger a security feature in Android that makes certain buttons inaccessible when an overlay is present. You will most likely notice it when you try to install apps from other app stores. To click the “Install” button, you must pause or close the “Filter” application. Many features also don’t work in your notification area.

Integrated options: Night Light

Before looking at third-party options, try using your Android phone or tablet’s built-in settings. The stock Android version is called Night Light, although it has a different name on some other phones. For example, on Samsung phones, it’s called “Eye Comfort Shield.”

Setting up and scheduling a blue light filter on Android is easy. For most phones, all you need to do is go to Settings > Display and find the Night Light option. You can schedule automatic activation and adjust the intensity of the effect. If you want more granular control, you’ll need to install the app.

Best Overall Blue Light Filtering App: Twilight

Twilight is the best blue light filtering app for Android. It gradually lowers the display’s color temperature (making it redder) and darkens the screen until it reaches the color and brightness level of your choice.

This gradual change means you’ll barely notice it. At first, the white is just slightly off-white, but the effect comes into full play when you’re lying in bed browsing Reddit.

Using your phone’s light sensor, Twilight can constantly and automatically adjust its settings to ensure they are always suitable for your ambient lighting conditions. After completing the initial setup, you won’t need to touch the app again.

Why Use Twilight When Android Already Has a Blue Light Filter?

Two features make it particularly useful. For one thing, you can set it to automatically disable when certain apps are opened. This way, your nightly Netflix viewing won’t be affected. Another thing is that it doesn’t just work on your phone. You can set it up to control Philips HUE or other smart light bulbs, or install it on an Android watch, Android TV, or Chromebook.

Root Options: Night Light (KCAL)

For most users, Twilight is the best option, but if your phone is rooted, you have the option of using a more powerful app in the form of Night Light (KCAL).

As a root app, Night Light can directly control the display. This actually reduces the amount of blue light emitted by the screen, rather than putting a red overlay on the screen to eliminate the effects of blue light.

It works more similarly to Android’s own Night Light, and the result is a higher quality image. The app doesn’t make everything reddish – blacks stay black, for example – and there’s no loss of contrast. It also won’t interfere with your notifications or other apps.

However, KCAL is not for everyone. You need to root your phone to use it, and you may need to install a custom kernel. It’s also not available through the Play Store. You can view it on the GitHub page and download it through the third-party app store F-Droid.

Reduce The Effects Of Blue Bight Without Filtering It

The blue light filtering effect is relatively easy to get used to. However, some people just don’t like it. If you don’t want all your apps to take on a reddish tint after sunset, there are easier ways to minimize the impact of blue light.

The key is to reduce the amount of exposure. Therefore, it is better to use a phone instead of a tablet due to the smaller screen. Reduce the brightness of apps as much as possible and switch to dark mode. You can even enable dark mode on all websites in Chrome.

Most e-book readers have white text on black or sepia options, which are easier on the eyes than standard black text on a white background. Google Play Books goes a step further and offers its own night light feature. It automatically turns on at sunset, then gradually removes more blue light from the display as it gets darker.

To enable this feature, open a book, click the Display Options button, go to Lighting, and click the Reading Night Light switch.

Reduce Eye Fatigue On Android

With Android’s Night Light feature and apps like Twilight, you have the freedom to use your phone without it getting in the way of your sleep. They’re easy to use, and even if the effect looks a little strange at first, you’ll get used to it quickly. Reducing blue light also reduces screen brightness and reduces glare, which can be helpful if you experience headaches or eye strain when using your phone

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