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An Idion Labs app

Nail every interview

Nailio plays the interviewer, asks the question you are hoping they skip, and follows up until the answer holds. Then it shows you what you actually said.

Live
What Nailio is

Interview preparation usually means reading a list of questions and thinking about the answers. That is not what the interview is. Nailio makes you say them: it plays the interviewer, asks one question at a time, and follows up when an answer is vague. Then it grades the recording, not a script, and shows you the transcript so you can see what came out under pressure.

Nailio

What it does

01

A mock interview that pushes back

Pick a mode and Nailio plays the interviewer. You answer out loud, and the follow-up gets harder when the answer was thin. That is the part rehearsing alone cannot give you.

02

Four scores, every answer

Content, structure, communication and confidence, graded on the audio you just recorded rather than on a script you would never have said out loud.

03

Paste the job description

Give Nailio the actual posting and the questions come from it, so you are rehearsing this interview rather than interviews in general.

04

The answer you meant to give

Every answer comes back with a stronger version of itself, next to yours, plus the fillers you leaned on and how fast you were talking.

05

A coach between rounds

A chat for the questions that come up while you prepare: how to frame the gap in your CV, what to ask them, what a number should be when they ask for one.

06

Readiness over time

Your scores by skill, session after session, so you can tell whether you are getting better or just getting more nervous.

How it works

How it works

A session is a short round, four or five questions long, and it ends with something you can fix before the real one.

  1. Choose the round

    A recruiter screen, a behavioural round, a role-specific or technical one, a salary conversation, or the curveballs. Or paste the job description and let the questions come from it.

  2. Answer out loud

    One question at a time, spoken, with no pause button and no second take. Nailio follows up the way an interviewer does when something was left vague.

  3. Read the transcript

    Word for word, with four scores, the filler words counted, your speaking rate, and the single change that would have made the most difference.

  4. Say it again, better

    A stronger version of your own answer, built from what you said rather than from a template, so the next attempt is yours and not somebody else's script.

Rehearsal, not screening

Nailio scores your answers so that you can improve them, and for no other reason. It is not a hiring tool: no employer sees your practice, no score leaves the app, and nothing here is used to rank or screen you. An app that grades interview answers should say that in plain words rather than leave it to be inferred, and it is written into the Terms of Use and the AI Policy as well as here.

Where Nailio is today

Live

Nailio is built and is not in the App Store yet. This page and the legal documents linked below go up first, because the store requires those URLs to resolve before it will review the app. There are no user numbers or reviews to show, and we would rather say that than invent them.

Questions

Does an employer ever see this?
Never. Nailio is rehearsal. Nothing you record, nothing you score and nothing you paste into it is shared with an employer, a recruiter, or anyone else. It is not a screening service and it does not act on your behalf.
Is my voice stored?
No. A recording is analysed as it arrives and then discarded — it is never written to our database or to any file store. What is kept is the transcript and the scores, and you can delete those at any time.
Can I practise for a specific job?
Yes. Paste the job description and Nailio writes the questions against it. That is a Pro feature; the fixed modes cover recruiter screens, behavioural rounds, role and technical questions, salary and curveballs.
What does it cost?
The first mock interview is fully unlocked, because the model answer and the follow-ups are the product. After that there is one free session a day, and a Pro subscription removes the limit and unlocks the full feedback.
Does a good score mean I will get the job?
No, and we will not pretend otherwise. A score is one reading of one answer by a model that can be wrong. A real interviewer may want something different. Treat it as practice feedback, not a prediction.

Rehearse before it counts

Nailio is coming soon. The question you are hoping they skip is the one to practise first.

Conceived, built and shipped by the Idion pipeline.

See how it works →