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120 free browser-based developer utilities. No sign-up required.

NailKeeper App
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Hands Off helps you overcome nail biting, nose picking, eyelash pulling, and other BFRBs with real-time visual reminders, all while keeping your data private on your device.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | devtoolstack.io | handsoffapp.com |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from Belgium · 1 - 9 employees · 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of DeveloperToolStack yet.
Hands Off: How to Quit Nail Biting for Good Quitting nail biting is hard. If you’ve ever tried bitter nail polish, gloves, fidget toys, or habit trackers, you know the problem: they only work when you remember to use them or aren't convenient at all. Nail biting doesn’t happen when you’re paying...
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Hands Off: Stop nail biting and other bfrbs with AI
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing DeveloperToolStack and Hands Off App.
Hands Off App's answer:
Hands Off uses real-time AI webcam monitoring to automatically detect and interrupt BFRBs the moment they happen. Unlike other solutions that rely on willpower or manual intervention, it catches unconscious habits in real-time and forcefully interrupts your workflow with screen-blocking popups. It requires zero active thought, no need to remember anything, it just works in the background until you need intervention.
Hands Off App's answer:
Most BFRB solutions fail because they require conscious effort during unconscious moments. Bitter nail polish gets bitten through, fidget toys sit unused, and habit trackers only work if you remember to log your behavior, but tracking a habit does not stop it. Hands Off solves the core problem: it catches you when you don't even realize you're doing it. The screen-blocking interruption is deliberately impossible to ignore, which is exactly what's needed for behaviors that happen during stress or focus. Plus, complete local processing means your privacy stays protected.
Hands Off App's answer:
Anyone suffering from BFRBs: nail biting, skin picking, hair pulling, face-touching. Typically office workers, students, or remote professionals who've tried multiple solutions without lasting success. They're tech-comfortable, privacy-conscious, and frustrated enough with traditional methods to try an unconventional solution that addresses the unconscious nature of their behavior.
Hands Off App's answer:
I (Lennert Soffers) was a chronic nail biter who tried everything, bitter polish, fidget toys, habit trackers, without lasting success. I could stay bite-free for weeks when hyper-focused, but stress would hit and I'd unconsciously bite my nails down again. I needed intervention exactly when I wasn't thinking about it. Since I couldn't have someone watch me all day at work, I built software to do it, something that would forcefully interrupt me without requiring memory or willpower. It worked for me, so I'm sharing it with others stuck in the same cycle.
Hands Off App's answer:
Electron for cross-platform desktop app, React for the UI, Firebase for authentication, and AI for real-time webcam analysis (all processing done locally on-device for privacy).
Share your experience with using DeveloperToolStack and Hands Off App. For example, how are they different and which one is better?
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