The moment you share your screen, Curtain draws closed — notifications silenced automatically, restored when you stop.
Drop Curtain in Applications and you're done. It reads the system's own privacy signal to know when you share — no intrusive Screen Recording permission required.
Present in Zoom, Google Meet, Teams, Slack huddles or QuickTime. Curtain notices the instant any app captures your screen.
Do Not Disturb switches on automatically. Stop sharing and everything snaps back — plus a quick recap of what you missed.
Curtain watches the same privacy indicator macOS lights up for Zoom, Meet, Teams, QuickTime, iPhone Mirroring and native recording. One system signal covers them all — no app list to fall out of date.
Curtain spots the moment screen-sharing begins without ever asking for Screen Recording access. It only sees window metadata, never the contents of your screen. (Grant the optional permission and it adds extra precision plus camera and mic detection.)
Do Not Disturb flips on the instant you share and turns off again the moment you stop. No notification ever sneaks onto the stream — and if Curtain ever quits or crashes mid-session, it reverts Do Not Disturb on its own the next time it opens, so you're never left stuck.
Curtain only ever says “protected” once it has actually switched Do Not Disturb on — no false comfort. Everything runs on-device: no account, no telemetry, no diagnostics. One-time purchase.
| Curtain | Muzzle | Stealthly | |
|---|---|---|---|
| Detects every share via the system signal — no permission needed | ✓ | ~ flaky | ✓ |
| Restores your Do Not Disturb as it was | ✓ | ✗ | ✓ |
| Post-call recap of what came in | ✓ | ✗ | ✗ |
| On-device, zero telemetry (no asterisks) | ✓ | ✓ | ~ diagnostics |
| One-time purchase (no subscription) | ✓ | free | ✓ |
| Actively maintained in 2026 | ✓ | abandoned 2021 | ✓ |
Curtain's whole interface is localized into 8 languages — it follows your Mac and speaks your language out of the box. No setup, nothing to switch on.
No — it's optional. Curtain detects the moment screen-sharing begins straight from the system's privacy signal, without you ever granting Screen Recording access. It only sees window metadata, never the contents of your screen. If you do grant the optional permission, it simply adds extra precision plus camera and microphone detection — but Curtain works fully without it.
Curtain watches the same privacy indicator macOS itself lights up whenever your screen is captured — the one that switches on for Zoom, Meet, Teams, QuickTime, iPhone Mirroring and native recording. Because it reads that one universal system signal rather than a hard-coded list of apps, it can't fall out of date, and it never needs to look at what's actually on your screen.
Yes — and Slack huddles, QuickTime, iPhone Mirroring and anything else that captures the screen. Because Curtain watches the system-wide privacy signal instead of specific apps, it doesn't matter which tool you present from.
It does. Recording lights up the same system indicator as sharing, so Curtain protects you whenever your screen is being captured — live call or local recording alike.
No. One-time purchase, yours forever. You get free updates within the same major version (all of 1.x). The whole point is no recurring fees for a tool that just sits quietly in your menu bar.
Up to 2 Macs you own, with a single license. Enter the key on each and you're set.
Everything runs on your Mac. Curtain reads only window metadata to know when capture starts — never the contents of your screen or your notifications. No account, no telemetry, no anonymous diagnostics, no network calls beyond the licence check and updates. 100% on-device, with no asterisks.
macOS 14 Sonoma or later, on both Apple Silicon and Intel Macs.
Absolutely — a 14-day money-back guarantee, no questions asked. Payments are handled by Paddle; just reply to your receipt and we'll sort it out.
Found a bug, or wish it did one more thing? Tell us — every message goes straight to the people who build Curtain. No account, no tracking.
