BlyndSyde

Hide your screen.
Anytime, anywhere.

Keep your screen private in public spaces: coffee shops, on the train, anywhere people could be snooping on you. Activate with one global hotkey:

⌃ + ⌥ + ⌘ + B
Download on the Mac App Store

14-day free trial · macOS 14.0 or later · Compatible glasses required

How it works

BlyndSyde uses an optical trick: deep red lenses make your screen readable to you, but to anyone else it's colorful chaos

Red-lens glasses held over a MacBook display, revealing readable text on a screen of scrambled color
  1. 1

    Put on the right glasses

    Deep-red, blue/green light-blocking lensesSee recommended pairs →

  2. 2

    Press ⌃⌥⌘B

    The global shortcut toggles BlyndSyde on or off from any window, any time

  3. 3

    You screen is now private

    Perfectly readable to you, but to anyone else it's a riot of color

See it in action

This is what it's like to use BlyndSyde

A Mac screen with BlyndSyde turned off — normal desktop visible
Imagine this is your desktop, and suddenly you notice someone snooping over your shoulder
BlyndSyde covering the entire screen — full-screen scramble for maximum privacy
You hit the BlyndSyde hotkey, and ...BOOM!... Your screen is instantly unreadable
The full-screen scramble as it appears through deep-red BlyndSyde glasses — fully readable
You casually pull out a pair of uber stylish deep-red lenses and carry on as if nothing happened
The same Mac screen with BlyndSyde On — content scrambled into a multicolor field
Optionally, hide only part of your screen
The scrambled screen as it appears through deep-red BlyndSyde glasses — readable again
To you the floating window appears almost transparent

Heads up — only deep red lenses work. Amber, yellow or other colors and even lighter red lenses won't work (we've tried them!) See our tested list →. DRM-protected and true fullscreen windows cannot be BlyndSyded (use Zoom or Fill mode). Screen Recording permission required. Nothing leaves your computer. No analytics. No telemetry. No tracking. No login.

Ready for privacy in public?

14-day free trial. Cancel anytime through the App Store. Local currencies may vary.

Monthly
$4.99 per month
  • 14-day free trial
  • Cancel anytime
  • All features included
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Save 50%
Yearly
$29.99 per year · just $2.50/mo
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  • Cancel anytime
  • Best value
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