Circadian

A browser extension that tints pages by time of day (daytime, sunset, bedtime).

As of June 2026, Circadian has 24 users in the Productivity category.

Usersup 200.0 percent+200.0%
24
24
Ratingno change0%
— reviews
Reviewsno change0%
Version
1.0.4
Manifest V3

History

5 snapshots

Tracking since Apr 19, 2026.

3318.54Apr 19, 2026Jun 9, 2026
View as table
DateUsersRatingReviewsVersion
Apr 19, 202681.0.4
Apr 28, 202681.0.4
May 16, 202681.0.4
May 29, 202661.0.4
Jun 9, 2026311.0.4
Now241.0.4

Permissions & access

Permissions
storageactiveTab
Host access
https://*/*

Screenshots

Circadian screenshot 1

About

Circadian is really simple. It creates an invisible element over your whole web page, then applies a CSS filter to it! There's a bit of math involved to calculate the RGB values from the blackbody radiation scale, but that's essentially it!

Philosophy:
Blue-light impacts our sleep and overall health by disrupting melanopsin receptor's normal function that calibrates our circadian rhythm. This extension's creation was inspired by f.lux's ability to adjust your device's color profile temperature based on the time of day to aid in preventing this. It's not perfect (this extension definitely isn't) but it's a simple tool many users use to help.

The idea: I was checking out some dark reader Firefox addons when I asked myself if any of these dark reader addons had temperature adjustments? I suspect not. And if I were to make an extension, I could use Orion on my iPhone to install my extension and essentially get f.lux on my iPhone! (Apple shut down f.lux's app) Obviously it's not system wide, but still kinda neat!

You can even pair Circadian with other dark reader extensions to get the best experience!

Technical

Version
1.0.4
Manifest
V3
Size
68.68KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
ciflpcbdlfgbjnclilnngfbkehipndpn
Developer ID
u3f9e7280ad2db65339ffe6d359d20927
Developer Email
[email protected]
Created
Nov 4, 2025
Last Updated (Store)
Nov 10, 2025
Last Scraped
Jun 9, 2026
Website
Privacy Policy

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Data sourced from the Chrome Web Store · last verified Jun 9, 2026.