Duos
Duos AI · Voice & Language · Leaning · AI Assistant
Duos is an AI interview practice app that turns interview prep into a live simulation. Paste a job posting, and it builds a realistic company, team, and set of questions, then runs a voice interview that adapts to your answers. When you finish, you get a verdict, green flags and red flags, and concrete tasks to fix the patterns holding you back. No guessing.
About Duos
What Is Duos
Duos is an interview simulator built by a small Netherlands-based team (Duos AI, KVK 81462549) that comes out of a boutique consultancy helping IT people land better offers. Instead of feeding you canned questions, it reconstructs the interview from the role you're actually applying for. The mock interviewer has a personality, adjust question depth as you talk, and pushes back when your answer is thin.
The pitch is blunt, and that's the point. Most people practice by rehearsing answers alone, which feels nothing like the real thing. Duos gives you the missing piece that candidates almost never get: feedback. It flags the specific moments that shaped the interviewer's opinion and points to the patterns behind them, so you know what to change before the stakes are real. That last part is the difference.
Two limits are worth knowing up front. The app is mobile-first, with iOS and Android builds, so desktop-only workflows aren't covered. No laptop version. And the grading leans generous early on, according to one paying user on the official site who noted it's still a bit too lenient on answers. Treat it as a practice partner, not a hiring committee.
Getting Started
- Download Duos from the App Store or Google Play, then create an account.
- Paste a job link so the app builds a company, team, and question set for your exact role.
- Upload your CV if you want the interview built around your real background and experience.
- Pick your interviewer's difficulty, from supportive to brutally honest, and start the voice interview.
- Talk through the questions, then review your verdict, flags, and the fixes the AI recruiter recommends.
Product Information
A quick look at Duos's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Job seekers prepping for a specific role
- Career switchers
- Non-native English speakers
Tasks
- Rehearsing behavioral answers
- Last-minute cramming
- Sharpening between real interviews
Scenarios
- The night before a final round
- Interviewing in a competitive market
- Practicing without an audience
Key features
Realistic voice interviews from any job posting
Paste a job link and Duos builds the company, team, and questions around that role. The interviewer speaks, you answer out loud, and follow-up questions change depth based on how you respond. That back-and-forth is what makes the session feel like a real interview instead of a quiz.
Adaptive AI interviewers with personalities
Each interviewer has a mood, style, and difficulty level, from supportive to brutally honest. Dial the pressure up or down depending on how near your real interview feels. It's a small touch. It also changes how honestly you answer. Try both ends.
Honest verdict and answer-level analysis
After a session you get a verdict on whether you'd get the offer, plus green flags and red flags tied to specific moments. Think of it as an AI interview coach that never flatters you. Scores break down across attitude, competence, and speech. It's the feedback loop most candidates never get, since rejected applicants rarely hear what went wrong.
Pattern tracking with real quotes
Duos pulls quotes from your own answers to show recurring patterns rather than one-off mistakes. Each pattern comes with a concrete task to fix it. Repeating sessions on the same role tells you whether the fix is holding.
CV-based personalization
Upload your CV and the interview adapts around your actual experience and skills. Questions tune to your background while still covering the common interview topics. It's a genuine difference from apps that fire the same list at everyone.
Privacy by design
Your voice is never stored, no human listens to your sessions, and CV uploads are encrypted. Nervous about recording yourself? That matters more than any feature list. Practice stays between you and the app.
Pros and cons
Pros
- Builds interviews from a real job posting, so this job interview simulator targets the role you're actually after.
- Voice-first format trains delivery, not just what you say.
- Feedback points to specific moments and recurring patterns, not generic advice, and lands close to real-time feedback.
- Privacy safeguards: voice isn't stored and no human reviews your sessions.
- Free to start, with no card required to run a first interview.
Cons
- Mobile-only. There's no desktop version, so you can't practice from a laptop.
- Grading runs lenient early on, per a paying user, which can give a false sense of readiness.
- Customization is limited right now, including fewer options for tailoring different interview types.
- No public API, so it can't plug into your own tools or workflows.
Frequently asked questions
Duos runs AI-powered mock interviews based on a real job posting, then gives you honest feedback on your answers, delivery, and patterns. It's built for practice before an interview, not for use during one.
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