Hands Down
Stop nail-biting while you work
Hands Down launched on May 2, 2023 with 82 votes, #868 of 4,910 launches that month and more than 50% of that year's launches.
What it does
Hands Down uses your Macbook's webcam to stop you from biting your nails while you work and browse. The app runs in the background, periodically checking on you. If it catches you biting it will blast you with warnings until you stop. It works!
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 :)
stopnailbiting.app2025 · stopnailbiting.app · ▲6I 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.
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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