ChillScreen app icon ChillScreen Download

Screen warmth and dimming for macOS

Automatically warm and dim your Mac screen in the evening.

ChillScreen gradually adjusts your display the way you choose. It can learn automatically from your adjustments, visualize circadian rhythms, work with AI agents and Siri, and give you detailed control over every setting.

14-day free trial

Try every feature free for 14 days.

No card required.

Download for Mac Buy ChillScreen — €9.99

After the trial: €9.99 once for one Mac · No subscription

Launch offer −50% for the first 100 licensesCode LAUNCH26 is applied automatically.

macOS 14 Sonoma or later · Apple silicon and Intel

A Mac App Store edition is also coming. It uses the same Daily Cycle core, with a few distribution-specific differences. Compare editions.

A dim evening workspace with a warm macOS desktop on the display.

See and adjust the Daily Cycle.

Set your wake time, when evening begins, and bedtime. Then adjust how quickly Warmth and Dimming reach their night levels.

Drag the timeline markers and curve handles to explore. This browser preview changes only the illustration; it does not alter your display.

06:12 20:34 06101418220206
Cortisol Melatonin Warmth Dimming

What ChillScreen can do

Choose what changes and when.

Each part solves a specific problem. Use only the controls you need, or open the linked guide section for the exact settings.

Automatic schedule settings

Automatic

Choose when the evening change starts, how long it takes, and the night levels.

Guide
Ambient Light settings showing a current sensor reading

Ambient Light

Direct edition: add extra warmth and dimming in dark rooms using thresholds you calibrate.

Guide
Ambient Light calibration controls

Ambient Light calibration

Direct edition: choose which room-light levels start and reach the maximum extra adjustment.

Guide
Learning History and saved adjustments

Learning

Use eligible evening corrections to improve the next Automatic recommendation.

Guide
Learning Model correction thresholds and response settings

Learning response

Set how much of a small or large correction changes future recommendations.

Guide
Learning Model confidence influence settings

Confidence influence

Control how quickly Learning responds while confidence is low or high.

Guide
Learning Model calculation for the latest adjustment

Latest adjustment

See how the newest eligible correction changes the learned target.

Guide
Effect Range settings

Effect Range

Define what 100% Warmth and Dimming mean before the daily cycle scales them.

Guide
Per-display adjustment settings

Multiple displays

Adjust Warmth and Dimming for one display without changing the shared cycle.

Guide
Shortcuts, Siri, and local agent controls

Shortcuts, Siri, and AI agents

Use Shortcuts and Siri in both editions, or local AI-agent commands in the Direct edition.

Guide
App exclusions and additional settings

App exclusions and LUT

Exclude selected apps and work with other colour tools; the Direct edition also controls temporal dithering.

Guide