Welcome, Advocate.
You've been invited to join the Sundown Advocate Program. Free lifetime access to the most advanced screen protection for Mac.
What you get
Lifetime access to Sundown
All features unlocked forever. No subscription, no expiration.
500K deep red
Night Shift stops at roughly 2700K and f.lux at 1200K. Sundown goes down to 500K.
Flicker-Free Mode + Anti-Dithering
Flicker-Free Mode keeps the backlight steady and dims through the gamma table instead. Anti-Dithering targets the temporal dithering Apple Silicon Macs apply.
Early access to new features
Sun-arc visualization, Oura integration, and more — you'll see them first.
How to activate
Open the DMG and drag to Applications
Double-click the DMG, drag Sundown to Applications folder.
Enter your license key
Use the key provided to you by the Sundown team. It activates lifetime access instantly.
Protect your eyes tonight
Click the moon icon in your menubar. Try the Midnight preset, the warmest at 500K.
Pro tips
- → Open Settings and try Flicker-Free Mode, which keeps the backlight steady and dims through the gamma table
- → The Scheduling tab lets you set your own times for morning, day, evening and night
- → The Midnight preset (500K) is the warmest of the eight — try it 2 hours before bed
Built for biohackers • trysundown.com