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Circadian Display

Mohit Tomar
System
Version
1.0.4
Size
3.4 MB
Requires
Android API 26+
4 / 5 · 7,759 ratings 3 downloads
Download APK

Updated Sep 22, 2026

Quick answer

Adaptive screen warmth and dimming curves for better evening comfort and sleep.

F-Droid repository metadata

Circadian Display continuously adjusts your screen's warmth and brightness throughout the evening based on customizable curves you define. Unlike standard night light solutions with fixed on/off schedules, Circadian Display provides a smooth, gradual transition tailored to your preferences.

Features: - Dynamic comfort curves with precise warmth and dimming levels over time - Dual-engine modes: Native (system-level, Android 10+ with ADB setup) and Overlay (software-based, works on all devices) - Background scheduler for automatic, hands-free operation - Privacy-first: completely offline, tracker-free, no data collection - Open source (Apache 2.0)

Screenshots

Circadian Display screenshot 1
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Circadian Display screenshot 9

What’s new

- Status bar clock, battery and Wi-Fi icons are no longer invisible on devices using the system dark mode
- Removed the dark flash when the app opens on devices using the system dark mode
- The navigation bar now matches the app's background instead of drawing a dark strip across the bottom

How to install

  1. Download the APK from the button at the top of this page.
  2. Allow “Install unknown apps” for your browser or file manager only, not for every app.
  3. Open the downloaded file and confirm the installation.
  4. If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.

Data safety

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  • Files are scanned for malware on every update.
  • The permissions each app requests are listed on its own page.
  • Read the full safety policy for how we test, flag, and delist files.

Frequently asked questions

What is Circadian Display?
Adaptive screen warmth and dimming curves for better evening comfort and sleep.
Who develops Circadian Display?
Circadian Display is developed by Mohit Tomar.
Which Android version does Circadian Display require?
Circadian Display requires Android API 26 or later.
What is the current version of Circadian Display?
The synchronized F-Droid version is 1.0.3.
Which license does Circadian Display use?
The signed F-Droid metadata lists Apache-2.0.
Where is the source code for Circadian Display?
https://github.com/tomar-mohit/circadian-display

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