Comparison
Sundown vs Night Shift: Why Built-In Isn’t Enough
Night Shift blocks 40%. Sundown blocks 97%. Your body knows the difference.
Feature
Sundown
Night Shift
Filtering range
500K–6500K (97% blocked)500K–6500K (97% blocked)
~2700K max (40% blocked)
Kelvin display
Real-timeReal-time
Flicker-free mode
Gamma dimmingGamma dimming
Scheduling
Auto-sunset + customAuto-sunset + custom
Basic (sunrise/sunset)
Keyboard brightness
F1/F2 interceptionF1/F2 interception
Anti-dithering
Apple SiliconApple Silicon
Presets
6 presets6 presets
Price
$4.99/mo (7-day free trial)$4.99/mo (7-day free trial)
Free (built into macOS)
Night Shift maxes out at 2700K. Sundown goes to 500K.
Night Shift is a mild warm orange. Sundown is deep red, blocking 97% of blue light. Your retinas, your melatonin, your circadian rhythm—they all know the difference.
97%
Blue light blocked at 500K
58%
More melatonin produced
7 min
Faster to fall asleep
Sources: Burkhart & Phelps 2009, Heo et al 2017, Esaki et al 2016
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