Recommend

opensource

Red Moon is a minimal, open-source blue light filter app designed for nighttime use. It applies a red filter to reduce blue light, dims the screen below Android’s minimum brightness, and supports scheduling based on sunset/sunrise or custom times. 

It’s lightweight and privacy-focused, with no ads or in-app purchases.

Key Features:

Adjustable color, intensity, and dimming levels (similar to Twilight’s sliders).

Automatic scheduling based on location (sunset/sunrise) or custom times.

Pause in excluded apps (e.g., Netflix, photo editors) to avoid color distortion.

Notification, widget, or quick settings tile for easy control.

Supports Android 7.0+ quick settings tiles.

https://github.com/LibreShift/red-moon