HALO - Bluelight Filter is a free Android app developed by OGOONS in the Lifestyle category with a focus on Health & Fitness. It is designed to reduce the harmful effects of blue light emitted by smartphones and adjust the light that affects the sleep cycle. This app is perfect for those who struggle with sleeping problems.

One of the key features of HALO is the Night Mode (Bluelight Filter) that can be turned on and off. It adjusts the intensity and brightness of the screen. The app also has a quick setting in the notification area, and a Night Mode ON/OFF timer that can be activated or deactivated. Additionally, HALO has an awesome feature that allows you to set a custom schedule for night mode. This feature is automatically activated when you use your device lying down on the bed.

HALO requires permission to draw over other apps to show the bluelight filter on the screen. It also requires permission to prevent the device from sleeping to run night mode at the scheduled time. Other permissions include receiving data from the internet, viewing network connections, and full network access, which are used for in-app purchases and serving ads.