Knock Alternative: The Gesture, Without the Second App
Knocking your MacBook to make something happen is a great idea. In Notchy it's one toggle inside the notch app you already run — with the trackpad and keyboard as backup triggers.
Why use Notchy instead of a dedicated knock app?
- Three triggers, not one
The chassis accelerometer, a Force Touch trackpad tap without a click, and a bare-modifier double-tap that works on every Mac including desktops. If a sensor stream won't open, the key path takes over automatically.
- It lands somewhere useful
A knock can open the file shelf, clipboard history or the camera mirror — surfaces that already exist in the app, rather than just launching something else.
- Per-app overrides
The same knock can pause music in one app and take a screenshot in another, without you touching a setting as you switch.
- No extra permission, no extra process
The key trigger uses the Accessibility grant Notchy already holds for its shortcuts. No Input Monitoring, and no second background app for one gesture.
- Where a dedicated app still wins
A gesture-first app can offer a richer gesture vocabulary and scriptable actions. Notchy's knock maps to Notchy's own action list.
How Notchy stacks up
Honest, feature-by-feature comparison of every major macOS notch app — no affiliates.
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Everything Notchy does, in one app
- Fluid Dynamic Island animations on the Mac notch
- Command palette (⌃⌥K) — every action one keystroke away
- Knock — double-tap a modifier key to open the notch
- AI usage tracker (Claude Code, Codex, Cursor, Copilot)
- Detach any tab into a menu-bar popover
- Now Playing music controls (Apple Music & Spotify)
- Time-synced karaoke lyrics under the notch
- Mac clipboard history shelf (password-manager safe)
- Searchable clipboard — filter by text, file name, or OCR'd words
- On-device OCR — copy a screenshot, get its text (Apple Vision)
- Window snapping — drag a window to the notch to tile it
- App Launcher — pin apps to the notch, open with one tap
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- Text snippets — TextExpander-style pastes from the ⌘K palette
- One-tap screen capture to clipboard + shelf
- Color eyedropper — sample any pixel, hex auto-copied
- System-wide mic mute for every meeting app at once
- Keystroke HUD for demos & screencasts (secure-input safe)
- Keyboard cleaning lock with countdown island (⌘⎋ unlocks)
- Menu-bar icon hiding — Bartender-style separator & chevron
- Live CPU / memory / network stats flyout
- Custom islands through the local developer API (off by default)
- iPhone-style call island — Answer/Decline FaceTime on the notch
- Notch Terminal — real VT100/xterm shell in a PTY, its own tab
- Camera Guard — alert (or block) when any app opens your camera
- Caps Lock HUD — brief island on every toggle
- Full Charge island with adjustable threshold + low-battery sound
- Alt HUD styles — edge-pinned bar or circular gauge off the notch
- Audio-reactive Now Playing visualizer (real FFT of system audio)
- Custom closed-notch idle animation — drop in your own Lottie JSON
- Drag-and-drop file drop shelf — persists across relaunches
- Zip & unzip files right from the shelf
- Image converter (HEIC, PNG, JPEG, TIFF, PDF) + video → GIF
- Run Apple Shortcuts with one tap
- Screenshots auto-staged on the shelf, ready to drag
- Download finished alerts with Reveal in Finder
- USB drive mount island with one-tap Eject
- Apple Reminders quick capture & due list
- macOS Pomodoro notch timer & stopwatch — streaks + 7-day chart
- Resizable expanded panel (width & height, live preview)
- System HUDs (volume, brightness, battery)
- Audio output switcher (speakers, AirPods, monitor)
- AirPods connection manager & battery
- Magic Mouse, Keyboard & Trackpad battery + low-battery alerts
- Quick notes & Calendar widgets
- Camera Mirror (check your appearance)
- Keep Awake (caffeine toggle)
- Teleprompter (Cuely) for Zoom calls
- Focus-aware alerts & native haptic feedback
- Lock screen widgets & hide-the-notch mode
- 134 languages, fully localized
- Native SwiftUI, tuned for Apple silicon
Knock alternative — FAQ
Is Notchy a Knock alternative?
Yes. Knocking the chassis to trigger an action is built into Notchy, alongside a trackpad tap and a modifier double-tap. There is no separate purchase for the gesture — it comes with the one-time licence.
Does it use the same accelerometer trick?
It reads the same chassis accelerometer Apple silicon laptops expose, watching for the sharp double impact of a knock while ignoring ordinary movement. Impact sensitivity is adjustable between light, medium and firm.
What if my Mac has no usable accelerometer?
Notchy falls back automatically. A Force Touch trackpad tap without a click works on modern laptops, and a double-tap of a bare Control, Option, Command or Shift key works on every Mac — desktops with external keyboards included.
What can the gesture trigger?
Open or close the notch, the file shelf, clipboard history or the command palette, mirror the camera, play/pause, skip tracks, mute, toggle caffeine, take a screenshot, start a Pomodoro, or lock the screen. Per-app overrides let the same knock mean different things in different apps.
What does a dedicated knock app still do better?
A single-purpose gesture app can go deeper on gesture vocabulary and on scripting arbitrary actions. Notchy’s knock maps to Notchy’s own action list — broad, but a fixed list rather than anything you can script.
Compare Notchy vs 263 Mac Apps
See how one Notchy license replaces dozens of single-purpose Mac utilities.