A session without another glowing rectangle
Ten, fifteen, or twenty minutes of full-screen red, plus Morning Red and Low Light. A timer and easy exit on the display you already own — not a dedicated panel.
Red light sessions on the display you already own
Fifteen minutes.
Your screen, full red.
Full-screen red with a timer, or a red filter while you work. Morning Red and Low Light are built-in sessions. This is not a dedicated panel. Press Escape to end a session.
Free to start. No account. Works on macOS 14+. Get notified for the Mac App Store.
Display P3 (1, 0, 0)~614.9 nm15-minute session⌥⌘R live filter
Outcomes first
What you get from the screen on your desk.
Red while you keep working
⌥⌘R remaps the desktop to red, like an accessibility color filter. More time under visible red without blocking the afternoon.
Honest numbers, not a costume
Calculated photometry is about 0.2–0.3 mW/cm² at the glass — not a measured panel dose, and not a 660 nm or 850 nm claim.
Two ways
A timed session, or a live filter.
15-minute session
Full-screen Maximum Red — Display P3 (1, 0, 0). Timed sessions default to the Staggered soft-grid look on a full red field, a session appearance for wellness and ambiance — not a treatment. Morning Red is the same 15-minute clock as a morning option. Low Light is a quieter 30-minute Dark Red field. Night Shift, True Tone, and Invert Colors off. Escape or Option-Command-Period exits.
Live red filter · ⌥⌘R
The desktop stays usable. The color is remapped to red. Option-Command-R toggles it. Option-Command-Period restores colors and ends a running session.
Straight answers
The three questions that should stop you.
Is this 660 nm?
Display P3 red’s published dominant wavelength is about 614.9 nm, a color description rather than a measured emission peak. The app does not provide 660 nm LED or 850 nm near-infrared output.
Is this medical?
No. This is a timed red-light session and wellness utility. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease. People search the category as red light therapy. Clinical benefits have not been established for this app.
Is a laptop enough?
A laptop is not a dedicated panel. Calculated output is about 0.2–0.3 mW/cm² at the glass. Choose it for timed sessions and a desktop red filter on hardware you already own — not as a substitute for a measured panel dose.
Pricing
Free to start. Pro is $9.99 once.
Free
$0
- 15-minute session, Morning Red, and Low Light
- Live red filter (⌥⌘R)
- One display
Pro
$9.99
- Lifetime unlock — no subscription
- Display Boost, multi-display, saved routines
- History and display profiling
Use the display you already own.
Red light sessions on your Mac. Fifteen minutes, or a live filter. Get notified when it is on the Mac App Store.
Works on macOS 14+. Not a medical device.