HALO - Bluelight Filter

Contains adsIn-app purchases
3.24K reviews
Content rating
Screenshot image
Screenshot image
Screenshot image
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About this app

Introducing HALO!
With HALO you can block the blue light and adjust brightness of the screen in dark places so that you can keep your eyes healthy and have a good night’s sleep.

You will find HALO useful when
- to block the harmful blue light emitted by device screens
- to dim the brightness that interferes with your sleep
- the built-in blue light filter in OS is not enough.

HALO has these features
- Night mode(the blue light filer) ON/OFF
- Adjust intensity and brightness
- Quick setting in the notification area
- Night mode ON/OFF in the top bar(Quick Settings Tile) (for Android Nougat 7.0+)
- Schedule Night Mode
- Activate/Deactivate the app (stop background service)

HALO also has this awesome feature!
- Set a custom schedule for night mode. "Apply this function when using your personal device while lying down on bed" It enables night mode at scheduled time only if you use your device lying down on.

* Execution Condition: it shifts to night mode only when the device is turned upside down (180˚), right side (90˚) or left side (270˚). It will not run night mode if you are walking around outside at that time.

Permissions details
- Receive data from the internet: used for in-app purchase and serving ads
- View network connections: used for in-app purchase and serving ads
- Full network access: used for in-app purchase and serving ads
- Run at startup: used to run HALO automatically when the device restarts
- Draw over other apps: required to overlay blue light filter
- Prevent the device from sleeping: required to run night mode at the scheduled time

Please refer to the information below
- HALO use a foreground service (the background service which must display a notification), so it would not be terminated by the system during use.
- Please do not worry about things that affect user experience. HALO does not drain battery. It doesn’t do unnecessary action either.
- The four filter colors that can be set currently are different from the actual filter colors. Actually, blue color is removed and reddish color is used to effectively block the blue light that is harmful to the eyes.

Permissions details
This app is free including ads!
Please purchase the pro version to remove ads and for more features.
If you enjoy using the app, please rate it 5 stars. Thank you for your support!
Updated on
Jul 31, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

3.12K reviews
A Google user
January 26, 2019
An absolutely beautiful app, but one whose function falls a little short. The app places a filter over the screen, but always messes with my original brightness, making it brighter when i have it at the lowest setting. This is obvious when i pull my notification menu down. Plus i have a OnePlus 6t, which has a larger screen than the filter itself, so I have a bright strip at the bottom of my phone. I'm not surprised other reviews mention battery draining.
26 people found this review helpful
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Rachel Newman
May 1, 2020
I love this, it's my favorite blue light filter for the phone. HALO is the best one I've found for use on the phone. It has multiple settings for brightness and type of back light color. The only 2 things I dislike is that when you screenshot while it's turned on actually affects the screenshot, and the drop down menu on the phone isn't affected by the app, so it's super bright and hurts my eyes. Other than that it's great!
27 people found this review helpful
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A Google user
August 11, 2019
it's a cute esthetic with the nice, cool colors. My only real issues with it is that it's really buggy. The OFF/ON times don't work properly, I always have to go into the app settings and changing it manually anyway. Even then, the app crashes (at least, I think that's what it's doing) because it, without warning, disables itself at random times. So it literally cannot do what it's me