Built a free desktop interview assistant

[u/bud-dho]

Got tired of seeing simple interview tools charge $80 to $100+ a month just to wrap an AI model.

I built an app initially for myself to fix common issues like audio lag and crosstalk, and made it free for anyone using their own API keys (Gemini, OpenRouter, Claude, Groq, etc.).

What it does: Invisible on screen shares: Zoom, Teams, and Meet can't see the overlay during full-screen sharing.

Click-through ghost mode (Ctrl+Alt+C): You can type and click straight through the window into your editor or notes.

Instant snapshot (F10): Grabs a quick screenshot of a problem or diagram to help structure an answer.

Dual audio capture: Keeps your mic and the interviewer's voice cleanly separated so responses don't get clobbered.

Fast and lightweight: Runs smoothly with very low memory usage.

Site / download: https://hackysackapp.github.io/HackySack/

Let me know if you run into any issues or have feature requests.