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 | |||
| Advanced Practice Mode | |||
| 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
- Advanced Practice Mode - Full-featured practice environment with screen analysis and detailed feedback
- Customization - Choose your AI model (GPT-4, Claude, Gemini) and get personalized responses based on your resume
Key Desktop Features:
Focused Practice Mode
Toggle the practice overlay with Ctrl/Cmd + B. Minimize distractions and focus on your preparation with a clean, streamlined interface.
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 advanced coding practice 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
- Portable Practice - Perfect for on-the-go preparation anywhere
- 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 desktop-exclusive features
- • Behavioral and live interviews (not coding rounds)
- • Quick backup option when traveling
Pricing: Same Across All Platforms
Desktop
1 credit/min
Full features
Web
1 credit/2 min
Better value
Mobile
1 credit/2 min
Better value
Web and Mobile offer better credit efficiency. Desktop costs more but includes exclusive features like coding mode, AI model selection, and personalization.
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 want the most comprehensive practice experience"
Use Desktop - full features including coding mode, AI model selection, and personalization.
"I need to practice for multiple round types"
Use Desktop - best for comprehensive practice with full features for both coding and behavioral mock interviews.
"I want to practice on the go with my phone"
Use Mobile - open in your phone browser for quick mock interview sessions and question practice anywhere.
"I want quick practice without installing anything"
Use Web or Mobile - both work great for mock interviews and question practice.
"I can't install software on this computer"
Use Web - no installation required, works in any browser.
"I want to practice behavioral interview questions"
Use Web or Mobile - both work great for behavioral interview practice.
"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 practice mode on Web or Mobile?
Coding practice mode requires system-level screenshot capture 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.
What is focused practice mode on Desktop?
Focused practice mode (Ctrl/Cmd + B) minimizes the Desktop app to a streamlined overlay so you can concentrate on your practice problems without distractions. It helps you simulate real interview conditions during practice.
Do I need to pay separately for each platform?
No. All platforms share the same credit pool. Desktop uses 1 credit per minute (includes premium features), while Web and Mobile use 1 credit per 2 minutes. Your subscription gives you access to all platforms.
Which version should I use for behavioral interview practice?
For behavioral interview practice, both Web and Mobile work great. Mobile has the advantage of portability. 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 interview preparation?
Desktop is recommended for Big Tech interview prep as it includes coding practice mode (essential for algorithm practice), AI model selection, and personalization features. It supports both behavioral and coding practice 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