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    Stealth, explained honestly

    Is LastRound AI detectable?

    Not on screen share or in recordings. The desktop app shows your answers in a window that macOS and Windows leave out of screen capture, so the people on the call see your desktop without it. It never joins the meeting.

    It cannot hide what is outside the video stream: your physical screen, your mouse pointer, and how you behave in a monitored test. This page covers both sides.

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    codesignal.com/assessment/live
    Screen Shared
    solution.js
    test.js
    1function mergeSort(arr) {
    2if (arr.length <= 1) return arr;
    3
    4const mid = Math.floor(arr.length / 2);
    5const left = mergeSort(arr.slice(0, mid));
    6const right = mergeSort(arr.slice(mid));
    7
    8return merge(left, right);
    9}
    10
    11function merge(left, right) {
    12const result = [];
    13let i = 0, j = 0;
    14
    15while (i < left.length && j < right.length) {
    16if (left[i] <= right[j]) {
    17result.push(left[i++]);
    18} else {
    19result.push(right[j++]);
    20}
    21}
    JavaScript  |  UTF-8Ln 8, Col 32
    Invisible to others
    Live<> Code
    28:45
    AskCaptureAnswerEnd
    Summarized question:

    Implement merge sort and explain the time complexity.

    ★ Answer:
    M
    Visible to you

    Drag the handle — the overlay exists only on your screen. Recordings and screen shares get the clean view.

    What the interviewer can and cannot see

    • You share your screen on a video call Hidden

      The overlay window is excluded from screen capture by macOS and Windows, so participants see your desktop without it.

    • The screen is recorded Hidden

      A recording captures the same stream as a screen share, so the overlay is absent from it too.

    • The meeting's participant list Hidden

      The app never joins the call. It listens to the audio your computer is already playing, so there is no bot and no extra participant.

    • What the interviewer hears Hidden

      Capture is one-way. Nothing is injected into the call, and your microphone carries only your voice.

    • Someone looking at your physical screen Visible

      Screen capture exclusion is a property of the video stream, not of your display. Anyone in the room, or a camera pointed at your monitor, sees the overlay.

    • Your mouse pointer Visible

      The pointer is shared even though the overlay is not, so clicking around the overlay shows as unexplained pointer movement. Use the keyboard shortcuts.

    Where it stays hidden

    Video calls. On Zoom, Google Meet, Microsoft Teams, Webex and other meeting apps, the overlay is not in what you share or in the recording.

    Coding and test sites in your browser. When a browser-based coding or test site records or shares your screen, the overlay is not in that capture either. Proctored platforms vary, and their rules apply whatever is technically visible, so check the rules and run a practice test first.

    Always on. Stealth starts when the overlay opens. There is nothing to switch on, on macOS or Windows.

    Where to be careful

    Stealth hides the window. It cannot change your behaviour, and some tests watch behaviour.

    • Leaving the test window. Clicking away from a test tab can be recorded as "left the page". Reading the overlay is fine; keep the test window active and use the shortcuts.
    • Pasting answers. Some tests flag large paste actions. Typing is safer than pasting.
    • Camera monitoring. If a test watches you through your webcam, glancing at the overlay can look like looking away.
    • More than one screen. A few tests flag setups with multiple monitors.
    • Locked-down tests. If a test makes you install its own program or use a secure browser, that software runs deeper on your computer and can block the overlay outright. We do not promise invisibility there; try a practice run first.

    Check it yourself before the interview

    1. Open the desktop app and go to Settings → General → Replay Setup.
    2. On the last step, run Check what others see, the QR-code stealth test.
    3. Share your screen in a test call with a friend or a second device and confirm the overlay is not there.
    4. Learn the shortcuts: ⌘/Ctrl + Enter to answer, ⌘/Ctrl + H to capture, ⌘/Ctrl + B to hide.

    See it in the real app

    Questions about detection

    Can Zoom, Google Meet or Microsoft Teams detect LastRound AI?

    The desktop app does not join the meeting and its window is excluded from screen capture by the operating system, so it does not appear in your screen share, in recordings or in the participant list. Run Check what others see before the interview to confirm on your own setup.

    Is LastRound AI 100% undetectable?

    No tool is. The overlay is hidden from screen share and recordings, but anyone who can see your physical screen can see it, your mouse pointer is shared, and some assessment platforms watch behaviour such as leaving the test window. Locked-down browsers can block it entirely.

    How do I check what the interviewer sees?

    The desktop app's setup wizard ends with Check what others see, a QR-code stealth test. Reopen it from Settings → General → Replay Setup.

    Does stealth need to be switched on?

    No. Stealth is on from the moment the overlay opens and stays on, on both macOS and Windows.

    Does the browser version stay hidden too?

    No. The browser copilot is a normal browser tab, so do not share your entire screen with it open. Only the desktop app is excluded from screen capture.

    See how it works in each round: coding interviews, online assessments, HireVue or every interview type. Your data is covered on the security page.

    Use LastRound AI in line with the rules of any interview or assessment you take part in.