Hey HN! 

  I built HostScan after getting tired of manually typing IP addresses like
  http://192.168.1.68:3000 into my phone every time I wanted to test responsive designs on real
  devices.

  What it does:
  - Click one button in VS Code
  - Automatically detects your running dev server (Next.js, Vite, Live Server, etc.)
  - Generates a QR code
  - Scan with your phone → instant mobile testing

  Key features:
  • Auto port detection (scans for ports 3000, 5173, 5500, etc.)
  • Smart IP filtering (ignores Docker/WSL/Hyper-V virtual adapters)
  • 100% local network (no external services, no accounts)
  • Works with Next.js, Vite, React, Angular, Python, and more

  It's open source (MIT): https://github.com/Intina47/hostscan

  The biggest gotcha I learned: Most dev servers only listen on localhost by default. Users need
  to bind to 0.0.0.0 (like `next dev -H 0.0.0.0`). The README has a comprehensive guide on this.

  Would love feedback from the community! What other pain points do you have with mobile testing?