The idea arrives early for most people: keep the interview on the laptop, run the assistant on a tablet or a phone beside it, and nothing on the call's screen gives anything away. It is a reasonable idea with a specific flaw, which is that an AI interview assistant needs to hear the interviewer, and a second device can only hear what comes out of the laptop's speakers, which means no headphones, a worse call, and a microphone-to-speaker loop that transcribes badly. This page covers what works on a second device and what does not, the audio and glance problems a second screen creates, when two devices genuinely help, and the single-device layout that most people settle on after trying the alternative.
What works and what does not
| Setup | Works? | Why |
|---|---|---|
| Desktop app on the laptop that carries the call | Yes | It captures system audio and your microphone directly |
| Desktop app on a second laptop | Only without headphones | The second laptop hears the call through its own microphone, from your speakers |
| iPhone app beside the laptop during a live call | No, for live help | The iPhone app is a practice app via TestFlight; it runs mock interviews, not live mode |
| Android APK beta beside the laptop | No, for live help | Same: a practice beta |
| Tablet showing your notes | Yes | Notes are notes; see AI interview assistant vs notes on paper |
| Phone as a hotspot or a backup for the call | Yes | The most useful second device there is |
The dual-monitor case, one computer and two screens, is different from the two-device case and usually better; its layout and its own risks are in using an AI interview assistant with dual monitors.
The audio problem
A second device has no access to the call. To hear the interviewer it must listen through its microphone to your laptop's speakers, which means you cannot wear headphones, your microphone picks up the speakers and sends an echo into the call, and the assistant transcribes a room recording rather than a clean feed. Transcription quality drops, the interviewer hears a worse version of you, and the whole arrangement is more fragile than the thing it was meant to fix. On a single device the desktop app captures the system audio before it reaches the speakers, so headphones work, the call is clean and the captions are built from a direct feed. The facts about what the interviewer can and cannot hear, with either arrangement, are in can the interviewer hear your AI interview assistant.
The glance problem
- A tablet beside the laptop is well outside the camera's line; every glance at it is a visible look away from the interviewer.
- A narrow assistant window directly under the camera on the same screen is a glance that looks like eye contact.
- Two devices mean two places to look, two sets of notifications and two things that can go wrong.
- The layout that works on one screen is described in where to position an AI interview assistant overlay.
- Screen shares and recordings on the laptop are handled by Ghost Mode on the same device; a second device adds nothing there.
When two devices do help
- Practice: the iPhone app runs mock interviews anywhere, which is how most people use it; the guide is in AI interview help on iPhone.
- Backup: a charged phone with the meeting app installed and the link ready is the thing that saves an interview when a laptop fails.
- Connectivity: a phone hotspot as a fallback for weak Wi-Fi.
- Notes: a one-page story bank on a tablet, propped under the camera, is accepted by most interviewers and does not need audio.
- Timing: a visible clock on a second device, so you are not checking the laptop's corner.
What most people settle on is one laptop running the call and the assistant, headphones, a narrow window under the camera, and a phone charged and ready as the backup. It is simpler, it transcribes better, and it fails less.
Where CoPilot Interview fits
CoPilot Interview is an AI interview assistant whose desktop app for Windows and macOS captures system audio and your microphone on the machine that carries the call, which is why live mode is a single-device product; the iPhone practice app via TestFlight and the Android APK beta run the free AI mock interview, which reads questions aloud and scores each spoken answer out of ten. The free plan gives 15 minutes a day of live help in sessions of up to 15 minutes, with AI mock interviews included. If you ever consider live help in a real interview, follow your employer's rules.
Disclosure: CoPilot Interview is our product, so weigh what we say about it accordingly.
Frequently asked questions
Can I run an AI interview assistant on a tablet next to my laptop?
Not usefully for live help: the tablet cannot hear the call except through your laptop's speakers, which means no headphones and poor transcription. The desktop app on the call's laptop captures audio directly.
Does the iPhone app work during a live interview?
No. It is a practice app that runs mock interviews. Live mode is the desktop app on Windows and macOS.
Is a second monitor the same as a second device?
No. Two screens on one computer keep the direct audio capture and only change where the window sits. That setup has its own guide.
What is the best use of a second device?
A charged phone with the meeting link as a backup, a hotspot for weak Wi-Fi, or the iPhone app for practice beforehand.
Where should the assistant window go on one screen?
Narrow and tall, directly under the camera, next to the interviewer's video tile, so a glance looks like eye contact.
Practice this interview before the real one
The AI mock interview builds questions from your resume and the job description, reads them aloud and scores each spoken answer out of 10. Included on the free plan.
Start a mock interview