Now available for macOS & Windows

Zero blue light.
No PWM flicker.

Tap Zap removes blue light completely and stops the invisible flicker that happens when you dim your screen.

GET TAP ZAP SEE HOW IT WORKS ↓

After 0K Red

Before 6,500K Cool Blue

True Red

100%

Blue Blocked

Zero

PWM

<1%

CPU

See it in action

Tap Zap running on a Mac — external monitor and laptop tinted red

The Problem

Existing solutions leave gaps.

Night Shift, f.lux, and built-in filters reduce color temperature. They don't eliminate blue light. And none of them do anything about the flicker.

Blue light persists

Even at warmest settings, Night Shift stops at ~2500K and f.lux at ~2000K. Blue wavelengths remain on screen. Reduced is not eliminated.

PWM flicker ignored

When you dim your screen, most LED panels use pulse-width modulation. This creates invisible flicker that no color filter addresses.

Heavy, clunky apps

Most blue light filters are large software with complicated interfaces that make your computer slow.

Tap Zap solves all three.

Tap Zap controls your display directly at the system level. Removes blue light at the wavelength level. Locks the backlight so PWM never engages.

What It Does

Blue light and PWM flicker.
Nothing else.

100% Blue Light Block

True 0K red. Not warm. RED.

Most filters tint your screen. Tap Zap removes blue and green light entirely. At full warmth, only red wavelengths reach your eyes. Drag the slider, watch the spectrum collapse.

HPCS-330P spectrometer held in front of a screen running Tap Zap at 0K — CCT reading 1001K with the spectrum collapsed into the red tail above 600nm

HPCS-330P spectrometer · Tap Zap at 0K

PWM-Safe Mode

Backlight locked. Software dims. Zero flicker.

When you dim your screen, the LED behind it isn't actually dim — it's flickering on and off too fast to see, but your eyes still feel it. Tap Zap keeps the LED at full power and dims in software instead, so the flicker never starts. Works on built-in laptop panels (Mac and Windows), Apple's Studio Display and Pro Display XDR, and most external monitors on Windows with DDC/CI support.

PWM-Safe Mode · backlight stays at 100%

Built Right

Everything else you'd expect.

Multi-Monitor

Plug in a second monitor and Tap Zap applies to it instantly. Unplug it, plug it back in — no restart, no reconfigure.

Native Performance

Uses less than 1% of your CPU. Doesn't drain your battery. Built natively for each platform — feels like part of the OS, not bolted on.

No Bloat

Two sliders, three presets, one ZAP button. Open the menu bar icon, drag, done. Quit the app and your screen reverts instantly.

Instant Response

Drag the slider, the screen changes the moment you do.

Cross-Platform

Native apps for macOS 12+ and Windows 10+. Whatever you learn on one works on the other.

Lifetime Updates

One purchase. Every future update included. No subscription, no account, no recurring fee.

Pricing

Pay once.
Use it forever.

No subscription, no account, nothing to cancel later. Buy Tap Zap once and every future update is yours, on both Mac and Windows.

Early Bird

Personal

$28$39

One-time payment. Launch pricing — goes back to $39 soon.

Works on Mac and Windows
Use it on up to 3 computers
Every future update, free, forever
No tracking, no account

Get Tap Zap

or Pay with Bitcoin / Lightning

Teams

Custom

For 5+ seats. Volume pricing and a single invoice.

Volume discount from 5 seats up
One invoice for the whole team
Bulk license keys
Priority email support

Reply within 1 business day.

FAQ

Frequently asked questions.

Night Shift only goes so warm — it caps at around 2500K, which is roughly the warmth of an old tungsten bulb. Tap Zap can take you all the way down to a fully red screen, which is the only way to actually eliminate blue light rather than just reduce it. Night Shift also doesn't touch your backlight, so even at maximum warmth you're still getting the same flicker if your screen uses PWM dimming.

f.lux is a solid app and we have a lot of respect for what it pioneered. That said, its warmth bottoms out around 1900K and stops there, and it doesn't touch your hardware brightness, so it doesn't address PWM flicker at all. Tap Zap goes further on warmth and pins your backlight at 100% to stop the flicker entirely.

Iris is powerful, but it's also a lot of app — dozens of menus, schedules, modes, and settings to wade through before you find what you came for. Tap Zap is deliberately stripped down: two sliders, three presets, and one ZAP button. It also pins your backlight at 100% to stop PWM flicker, which is the part most flicker-sensitive users actually need and Iris doesn't offer.

It's a toggle inside Tap Zap that pins your backlight at 100% so it stops flickering, then dims your screen in software instead. Your warmth and brightness sliders still work the way you'd expect; the hardware just never enters PWM territory. On Mac it works on built-in laptop panels, the Studio Display, and the Pro Display XDR. On Windows it works on built-in laptop panels and most external monitors with DDC/CI support.

No on both platforms. On Mac, the filter is applied as a final display overlay, so screenshots, screen recordings, and anything you share on Zoom or Google Meet look completely normal to everyone else. On Windows, the same is true — screenshots come out clean, and most screen-share and recording tools capture the un-tinted frame because Tap Zap's color effect is applied at the display compositor level. If you ever want to be absolutely sure before sharing, hit the OFF preset and the screen reverts instantly.

macOS 12 (Monterey) and later, on both Apple Silicon and Intel Macs, plus Windows 10 and later. There's no iOS, Android, or Linux version — the system-level color and backlight control Tap Zap relies on simply doesn't exist on those platforms.

Three. One purchase covers your laptop, your desktop, and one more machine if you have it. You can deactivate a device from inside the app at any time to free up a slot, so swapping computers down the line isn't a problem.

Almost none. Roughly every 90 days the app checks in with the license server to confirm your key is still valid — that request contains your license key and a device ID, and nothing else. No analytics, no telemetry, no account, no email tracking, no ads. The app works completely offline most of the time.

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Stop your screen from
working against you.