Progressive Web App (PWA)

Overview

A web-based app that runs in browser but behaves like a native app.

Advantages

• Works on any device (phone, tablet, laptop)
• No app store approval needed
• Single codebase for all platforms
• Can request microphone permissions
• Can run in background (with limitations)
• Installable to home screen

Implementation

Tech Stack

• React/Next.js or Vue frontend
• Web Audio API for microphone access
• WebSocket connection to Nexus
• Service Worker for background operation

Key Features

// Request microphone
const stream = await navigator.mediaDevices.getUserMedia({ audio: true });

// Connect to Nexus via WebSocket
const ws = new WebSocket('wss://nexus.corlera.com/voice');

// Send audio for wake word detection
ws.send(audioData);

Limitations

• Browser may suspend background audio after a while
• iOS Safari has stricter restrictions
• Needs user interaction to start audio

Workarounds

• Keep-alive pings to prevent suspension
• "Tap to activate" button for iOS
• Desktop PWA has fewer restrictions