Nox is a research-based screen filter for macOS designed for people with light sensitivity and migraine photophobia. Unlike traditional blue light filters that simply shift color temperature, Nox uses spectral curve modeling to attenuate specific wavelengths across the visible spectrum.
Key Features
- 12 Research-Based Presets: Including FL-41 tint, 480nm notch filter, narrow-band green, e-paper simulation, low blue, sunset, warm rose, evening, reading, gaming, eye comfort, and full grayscale mode
- Live Melanopic Readout: Real-time tracking of melanopsin-activating light blocked by your current filter settings
- Custom Preset Editor: Adjust RGB channels, gamma, color temperature, and per-channel levels to create your own filters
- Advanced Controls: Dimming, black point, and contrast adjustments to take the screen below its hardware brightness floor
- Break Reminders: macOS notifications with sound at customizable intervals (10–60 minutes) with a 20-second guided countdown
- Automatic Scheduling: Custom on/off times or sunset-to-sunrise based on your Mac's approximate location, computed on-device
- Pause & Resume: Step away for 15 minutes, an hour, or until morning without losing your setup
- Multi-Display Support: Works across multiple monitors
- Global Keyboard Shortcut: Quick toggle from anywhere
Pricing
14-day free trial with full features and no credit card required. One-time purchase of $5 (early-access pricing, increasing to $9.99).
Requirements
macOS 14 or later
Science
Nox is grounded in published research on photophobia. It targets the 480nm melanopsin peak sensitivity found in ipRGCs (intrinsically photosensitive retinal ganglion cells), preserves the 530nm narrow-band green wavelength shown to be best tolerated in light sensitivity studies, and emulates FL-41 tinted lenses associated with a 74% reduction in migraine frequency in clinical trials.
