CircadianShield
OursMac 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.
Published by CircadianShield. We make one of the apps listed here, and it is labelled.
- 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