Blue Light Filter - Night Mode by Leap Fitness Group is an Android app designed to reduce blue light emitted from your phone[SQ]s screen. This reduction aims to improve sleep quality by lessening the disruption to your body[SQ]s natural sleep-wake cycle (circadian rhythm) caused by exposure to blue light before bed.

The app likely offers features such as :

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Adjustable color temperature:

Users can customize the intensity of the filter, shifting the screen[SQ]s colors towards warmer, orange-yellow hues.
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Scheduled operation:

The filter can be automatically enabled and disabled at specific times, such as during the evening and night.
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Customizable schedules:

Users can set their own preferred times for the filter to activate and deactivate.
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Brightness control (potentially):

Some similar apps also include brightness adjustment to further reduce screen glare.
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Different filter strengths:

Allowing users to choose how strong the blue light reduction effect is.

Essentially, it[SQ]s a tool to make your screen easier on your eyes and potentially improve your sleep by reducing exposure to blue light at night. However, the effectiveness of such apps for sleep improvement can vary from person to person.