Show HN: EdgeSpeech, on-device speech-to-speech for React Native

Synervoz released EdgeSpeech, an open-source React Native hook for on-device AI speech-to-speech processing that runs completely locally, claiming up to 99% cost savings over cloud alternatives. The library supports iOS with Android support coming soon, and includes built-in demo credentials for immediate testing.

A React Native hook that provides on-device AI speech processing, completely locally. This can be up to 99% cheaper than cloud speech-to-speech. | Platform | Status | |---|---| | iOS | Supported | | Android | Coming soon | js import { EdgeSpeechProvider, useEdgeSpeech } from '@synervoz/edgespeech' function VoiceChat { const { listen, speak, onTranscriptComplete } = useEdgeSpeech onTranscriptComplete async text = { const response = await chat text await speak response } return <Button onPress={listen} title="Start Listening" / } export default function App { return <EdgeSpeechProvider appId="YOUR APP ID" appSecret="YOUR APP SECRET" <VoiceChat / </EdgeSpeechProvider } Tip The included example app /switchboard-sdk/EdgeSpeech/blob/main/example shows a complete speech-to-speech workflow. npm install @synervoz/edgespeech | Requirement | Minimum | |---|---| | React Native | 0.74+ | | iOS | 13.4+ | | Node.js | 22+ | | expo-modules-core | 2.0.0+ | Add microphone permission to your Info.plist or via app.json infoPlist for Expo managed workflow : <key NSMicrophoneUsageDescription</key <string This app needs microphone access for voice input</string Build your app: npx expo run:ios The useEdgeSpeech hook provides access to the main functions of the Switchboard SDK. Wrap your app in the EdgeSpeechProvider and configure it. <EdgeSpeechProvider appId="YOUR APP ID" // Optional: Switchboard app ID appSecret="YOUR APP SECRET" // Optional: Switchboard app secret sttModel="whisper-base-en" // Optional: STT model default: 'whisper-base-en' ttsVoice="en GB" // Optional: TTS voice default: 'en GB' vadSensitivity={0.5} // Optional: VAD sensitivity 0.0–1.0 default: 0.5 <App / </EdgeSpeechProvider Tip This library ships with built-in demo credentials so you can run it immediately without creating a Switchboard account. Note Your Switchboard APP ID and APP SECRET are safe to bundle in your application . They function like a publishing key and are intended to be distributed with your app. Access the state and actions from any component with the useEdgeSpeech hook. const { // State transcript, // string — live interim transcript clears on final voiceState, // 'idle' | 'listening' | 'processing' | 'speaking' error, // string | null hasMicrophonePermission, // boolean | null // Actions listen, // = Promise<void stopListening, // = Promise<void speak, // text: string = Promise<void stopSpeaking, // = Promise<void requestMicrophonePermission, // = Promise<boolean // Callbacks onTranscriptComplete, // cb: text: string = void = void — fires on final transcript onInterrupted, // cb: = void = void — fires when VAD interrupts TTS } = useEdgeSpeech