About Circadian Display
Circadian Display adjusts an Android screen’s warmth and brightness over time using curves that the user can customize. Instead of switching a night display filter on or off at fixed times, it can make a gradual transition with selected levels of warmth and dimming throughout the evening. The curves let users set how the display should change as time passes, while a background scheduler can apply those settings automatically. The app provides two ways to change the display. Its native mode uses system-level controls on Android 10 and newer and requires setup with ADB, Android’s developer command-line bridge. Its overlay mode applies a software layer and is described as working across devices. The two modes provide different routes to the same purpose: adapting screen appearance according to a personal schedule. Circadian Display may suit people who prefer a gradual evening adjustment over a single fixed night-light setting, or who want dimming and color warmth to follow their own pattern. The evidence describes the product as offline, without trackers or data collection. It does not specify particular health effects, so its curves should be understood as display controls intended for comfort rather than as a guaranteed sleep aid. The native option’s Android version and setup requirements are practical considerations when choosing which mode to use.
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