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.
99.7% blue light protection (500K)
5x deeper than Night Shift. The deepest screen tint available on Mac.
Flicker-Free Mode + Anti-Dithering
Eliminate PWM headaches and Apple Silicon GPU flicker. Features only Sundown offers.
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 Biohacker preset for maximum protection.
Pro tips
- → Open Settings and try Flicker-Free Mode if you ever get screen headaches
- → Enable Follow the Sun to auto-activate at sunset
- → The Biohacker preset (500K) blocks 99.7% of blue light — try it 2 hours before bed
- → Sundown uses zero CPU and collects zero data — it just works
Built by Ra Optics • trysundown.com