You can go from download to your first live session in about five minutes. Do it a day before your interview, not ten minutes before — future you will be grateful.
1. Install the desktop app
Zustly runs on macOS 13 or later (Apple Silicon) and Windows 10 or later. Download the installer from the homepage, open it, and drag Zustly into Applications on Mac or follow the installer on Windows.
2. Grant two permissions
Zustly needs exactly two things from your operating system:
- Screen recording — so it can read the problem or slide you're looking at
- Audio capture — so it can follow what the interviewer is saying
3. Add your resume and the job post
This is the step that makes answers sound like you. Upload your resume once, then paste the job description for each role you're interviewing for. Zustly uses your real projects and the role's keywords in every suggestion.
4. Pick a mode
Choose the mode that matches your round:
- Behavioral — STAR-shaped stories from your own experience
- Technical — approach, complexity and edge cases for coding prompts
- System design — a clarify-estimate-design outline
You can switch modes mid-call with the hotkey if the interview changes direction.
5. Run a screen-share test
Start a test meeting in Zoom, Google Meet or Teams, share your whole screen, and open Zustly. Ask a friend on another device what they can see — the answer should be just your desktop.
You're ready
That's it. On the day, open Zustly before you join the call, check the mode, and let it listen. If you want a deeper look at what the interviewer sees, read how Zustly stays invisible on screen share.
