CircadianShield
Mac and Windows app that dims in software for PWM-sensitive eyes and shifts your display through the day. One-time price.
The maker's own words say it acts on PWM flicker, brightness and blue light.
- Runs on
- Mac, Windows
- Price
- US$27, one time (Core). Trial: 7 days (card required). Source: circadianshield.com
- Status
- Operating
- Website
- circadianshield.com
- Checked
- 28 Sep 2026
What the maker says, in four columns
Lit: the maker's own words say the app acts on it. Outlined: mentioned, not claimed. Blank: not stated.
PWM flickerSays the app acts on this
“dims in software for PWM sensitive eyes”Source: circadianshield.com
Dithering
Not stated by the maker.
BrightnessSays the app acts on this
“Hardware brightness stays high, where flicker is lowest, while a software overlay does the dimming.”Source: circadianshield.com
Blue lightSays the app acts on this
“Your display color temperature adjusts automatically as the sun moves. Warm at night, bright in the morning.”Source: circadianshield.com
Other apps that say they act on PWM flicker: BetterDisplay, CareUEyes, Iris
Other apps that say they act on brightness: BetterDisplay, CareUEyes, Iris, ColorControl, DisplayBuddy, Lunar, MonitorControl, Monitorian, PangoBright, Twinkle Tray
Other apps that say they act on blue light: CareUEyes, Iris, Apple Night Shift, f.lux, Windows Night light