Arianna I

Knock

18 yr old scaling their 1st launched app

#103883448 followers 0 following

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About

I’m Arianna, an 18-year-old solo founder. I run Knock, a Mac app that turns physical taps on your laptop into shortcuts. It reads your Mac’s accelerometer (the sensor that detects motion and vibration) to trigger actions. When I’m not shipping code, I’m out mountaineering and hiking - I just recently summited Mt Hood and Mt St Helens :P

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Tastemaker

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Maker History

KnockSecret button to control your Macbook!
Oct 2026

🎉

Joined Product HuntSeptember 22nd, 2026

Forums

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10h ago

Knock - Create shortcuts by hitting your mac

Knock is a shortcut app that lets you control your Mac by simply knocking on it. Tap the sides of your laptop and it runs any shortcut you want — screenshot, open apps, mute sound, and more. It uses your Mac's built-in accelerometer to actually feel the vibration of your knock and react in real time, no extra hardware needed - just knock and go.