stopnailbiting.app
I recently switched from hybrid home office to being fully remote. I realized I'd developed a new habit: biting my nails, something I never did in the office. I've built a small utility app that lives in your macOS menu bar and uses the webcam to detect when you start biting your nails or touching your face. All processing happens on-device, and no data ever leaves it. Detection's frames per second and some overlay styles can be customized.
stopnailbiting.app launched on August 13, 2025 with 6 votes. The site was still online in September 2026, 1 year on.
What it does
A simple macOS app that uses the device camera to detect hand and face movements and provides instant visual feedback to help you stop nail-biting. Detection running on-device, no personal data ever leaves your Macbook.
A simple macOS app that uses your camera to provide instant, private visual feedback to help you stop nail-biting. Your data never leaves your Mac.
Does a similar job
all alternatives →- SNStop nail-biting with your MacBook's webcam2023 · handsdown.kianpak.com · ▲21
Hey HN! I made this app because I bite my nails way too much while I code It uses Mac's Vision library to track the location of your hands and mouth via the webcam. Then when it catches you biting, it temporarily covers your screen with a big obnoxious warning. You have to stop biting if you want to continue seeing anything. It's helped me a lot, so I hope it can help other nail-biters here :)
A desktop app that blocks work when you bite your nailsJan 2026 · github.com · ▲16Saw this repo: https://github.com/tldev/posturr and wanted to share my solution to avoid nail biting :)
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