LastRound AI: Desktop vs Web vs Mobile - Which One Should You Use?
LastRound AI is available on three platforms: Desktop App, Web App, and Mobile Browser. Each version is optimized for different interview scenarios. Here's exactly when to use each one.
Quick Comparison
| Feature | Desktop | Web | Mobile |
|---|---|---|---|
| Coding Interview Mode | |||
| Live Interview Mode | |||
| Stealth Mode (Invisible on Screen Share) | |||
| Screen Analysis | |||
| Audio Capture | System audio (interviewer) | System audio (interviewer) | Phone mic (listens to laptop speakers) |
| AI Model Selection | |||
| Personalization (Resume-based) | |||
| Installation Required | Yes (macOS/Windows) | No | No |
Desktop App - The Full Experience
Best For:
- Coding Interviews - The ONLY version that supports coding rounds with screenshot capture and problem analysis
- Screen-Share Interviews - Stealth mode makes the app completely invisible during screen sharing
- Customization - Choose your AI model (GPT-4, Claude, Gemini) and get personalized responses based on your resume
Key Desktop Features:
Stealth Mode
Toggle visibility with Ctrl/Cmd + B. The app becomes completely invisible on screen share - interviewers cannot see it even when you're sharing your entire screen.
Coding Interview Mode
Capture screenshots of coding problems, get AI-powered solutions with explanations, and manage a queue of problems. Exclusive to desktop.
AI Model & Personalization
Choose between GPT-4, Claude, or Gemini. Upload your resume for personalized responses that match your background.
When to Use Desktop:
- • Any coding interview or technical assessment
- • Video interviews where you're sharing your screen
- • When you want AI model choice and personalization
- • Full-day interview loops where you need all features
Web App - Quick Access, No Install
Best For:
- Quick Live Interviews - No installation needed, just open in browser
- Screen Analysis Available - Can analyze what's on your screen (browser tab)
- Audio Transcription - Captures interviewer's audio through system audio
The web app is perfect when you need interview assistance quickly without installing anything. It supports live interview mode with screen analysis and audio capture (interviewer's audio only, same as desktop).
When to Use Web:
- • Behavioral or live interviews (non-coding)
- • When you can't install software (work computer, etc.)
- • Last-minute interview prep
- • When you don't need stealth mode or coding features
Mobile Copilot - Use Your Phone as a Second Device
Best For:
- Second Device Setup - Open on your phone browser while interviewing on your laptop
- Mic-Based Audio Capture - Your phone's microphone listens to your laptop speakers
- No Screen Share Needed - Perfect when you don't want to or can't share your screen
- Browser-Based - Just open in your mobile browser, no app download needed
Mobile Copilot runs in your phone's browser and uses your phone's microphone to listen to audio from your laptop speakers. Place your phone near your laptop during the interview, and it will transcribe the conversation and provide AI assistance.
How Mobile Audio Capture Works
Mobile Copilot uses your phone's microphone to pick up audio from your laptop speakers. This means it can hear both the interviewer (through your laptop speakers) and your responses. Position your phone near your laptop for best results.
When to Use Mobile:
- • As a second device alongside your laptop during video interviews
- • When you can't install the Desktop app
- • When you don't need screen share or stealth mode
- • Behavioral and live interviews (not coding rounds)
- • Quick backup option when traveling
Pricing: Same Across All Platforms
Desktop
1 credit / minute
Full features
Web
1 credit / minute
Same rate
Mobile
1 credit / minute
Same rate
All platforms use 1 credit per minute — pick by feature, not cost. Desktop still has exclusive features like coding mode, stealth mode, and personalization, but the per-minute rate is identical across Desktop, Web, and Mobile.
Decision Guide: Which Version for Your Situation?
"I have a coding interview coming up"
Use Desktop - it's the only version with coding interview mode.
"I'm sharing my screen during the interview"
Use Desktop - stealth mode keeps the app invisible on screen share.
"I have an all-day interview loop (multiple rounds)"
Use Desktop - best for any interview type with full features for both coding and live rounds.
"I want to use my phone as a second device during the interview"
Use Mobile - open in your phone browser and place near your laptop to capture audio.
"I don't need screen sharing for this interview"
Use Web or Mobile - both work for live interviews without screen share.
"I can't install software on this computer"
Use Web - no installation required, works in any browser.
"I have a behavioral interview, no screen share"
Use Web or Mobile - both work great for live interviews.
"I want personalized responses based on my resume"
Use Desktop - only version with resume-based personalization.
"I want to choose my AI model (GPT-4, Claude, Gemini)"
Use Desktop - only version with AI model selection.
"I'm interviewing while traveling / on the go"
Use Mobile as a second device alongside your laptop, or Web if you have a laptop available.
Get Started
Frequently Asked Questions
Can I use multiple versions with the same account?
Yes! Your LastRound AI account works across all platforms. Your credits are shared, so you can seamlessly switch between Desktop, Web, and Mobile based on your interview needs.
Why can't I use coding interview mode on Web or Mobile?
Coding interview mode requires system-level screenshot capture and stealth mode capabilities that are only possible with the Desktop app. Web browsers have security restrictions that prevent these features.
How does Mobile Copilot capture audio?
Mobile Copilot uses your phone's microphone to listen to audio from your laptop speakers. Place your phone near your laptop during the interview. It picks up both the interviewer's voice (from your speakers) and your voice, giving the AI full conversation context.
What's the difference between Desktop/Web audio and Mobile audio capture?
Desktop and Web capture system audio directly (what comes through your speakers/headphones). Mobile uses the phone's microphone to listen to your laptop speakers externally. Desktop/Web is more reliable; Mobile is a good backup option when you can't use those.
Is the stealth mode on Desktop really invisible during screen share?
Yes. When stealth mode is enabled (Ctrl/Cmd + B), the Desktop app becomes completely invisible to screen recording and screen sharing software. Interviewers cannot see it even when you're sharing your entire screen.
Do I need to pay separately for each platform?
No. All platforms share the same credit pool, and all of them use the same rate — 1 credit per minute on Desktop, Web, and Mobile. Your subscription gives you access to all platforms; pick the one whose features fit the interview, not the price.
Which version should I use for a video interview without screen share?
If you don't need screen sharing, both Web and Mobile work great. Mobile has the advantage of capturing both sides of the conversation. Desktop is best if you want AI model selection or personalization features.
Can I switch between platforms during an interview?
While technically possible, we recommend sticking with one platform per interview session for the best experience. However, some users keep Mobile as a backup alongside Desktop for different interview rounds.
Which version is best for FAANG/Big Tech interviews?
Desktop is recommended for Big Tech interviews as they typically include coding rounds (requires Desktop), screen sharing (stealth mode), and multiple rounds where personalization helps. It supports both live and coding interview modes.
Does Mobile Copilot work on tablets?
Yes! Mobile Copilot works on any device with a mobile browser, including iPads and Android tablets. The interface adapts to different screen sizes.
Last updated: January 2026
Written by
Shekhar
LastRound AI
On the LastRound AI team. Writes about career advice, behavioral interviews, and how to navigate hiring at startups and big tech.
Further reading
- US Bureau of Labor Statistics — Official US tech career outlook
- Stack Overflow Developer Survey — Annual industry pulse on tech careers
- GitHub Octoverse report — Yearly state of software development
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