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SEPIA-Framework

SEPIA-Framework/sepia-html-client-app

Cross-platform browser, Android and iOS client for the SEPIA personal voice assistant, with chat, speech input and TTS output.

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What is it?

The SEPIA app is the main client for talking to a SEPIA assistant. It is written in JavaScript and HTML, runs in any modern browser on desktop, Android and iOS as a web or PWA app, and can also run headless as a smart speaker or smart display on single-board computers such as the Raspberry Pi.

Users can control the assistant by voice, touch or text. Speech recognition uses native platform APIs or the open-source SEPIA STT server, and speech output uses native APIs, the SEPIA server or tools such as Mary-TTS and Larynx. Built-in wake-word support is provided through the SEPIA Web-Audio library, and an always-on mode shows an animated avatar.

The client also supports chat with other users on the same server over WebSocket, in-chat cards and audio playback, custom HTML voice and media-player widgets, a teach interface for adding commands, and remote actions between devices.

Key features

  • 01Voice, touch and text control on Android, iOS and modern browsers
  • 02Speech recognition via native APIs or the open-source SEPIA STT server
  • 03Wake-word support and an always-on mode with animated avatar
  • 04Chat with other users over a private WebSocket connection
  • 05Custom HTML voice widgets and media-player widgets
  • 06Teach interface for adding new commands and actions

Use cases

  • Running a voice assistant on a Raspberry Pi as a headless smart speaker or smart display
  • Using a self-hosted SEPIA assistant from a phone home screen as a PWA
  • Building custom voice widgets or media players for the SEPIA client
  • Teaching a personal assistant new commands through the teach interface

Quick start

  1. 1

    Open the latest web app in your browser

  2. 2

    Install the Android app from Google Play

  3. 3

    On iOS, open the default link in Safari and add it to your home screen as a PWA

Things to know

  • Many features require your own SEPIA server; the public demo mode offers only limited functionality.
  • The native iOS app development is on hold, so iOS use relies on the PWA in Safari.

In collections

AI video & audio toolsAndroid apps & phone toolsAI chatbots & chat clientsOpen-source personal AI agents

Topics

#voice-assistant#chatbot#personal-assistant#speech-recognition#text-to-speech#pwa#web-speech-api#cordova#android#bot-messenger

FAQ

What is sepia-html-client-app?
Cross-platform browser, Android and iOS client for the SEPIA personal voice assistant, with chat, speech input and TTS output. The SEPIA app is the main client for talking to a SEPIA assistant. It is written in JavaScript and HTML, runs in any modern browser on desktop, Android and iOS as a web or PWA app, and can also run headless as a smart speaker or smart display on single-board computers such as the Raspberry Pi.
Is sepia-html-client-app free to use? What license does it have?
sepia-html-client-app is open source under the MIT license. Check the license terms before using it in commercial products.
Is sepia-html-client-app still maintained?
Actively maintained. The last commit to sepia-html-client-app was on Sep 29, 2026.
What can I use sepia-html-client-app for?
Running a voice assistant on a Raspberry Pi as a headless smart speaker or smart display Using a self-hosted SEPIA assistant from a phone home screen as a PWA Building custom voice widgets or media players for the SEPIA client Teaching a personal assistant new commands through the teach interface
How do I install sepia-html-client-app?
Open the latest web app in your browser Install the Android app from Google Play On iOS, open the default link in Safari and add it to your home screen as a PWA
Where can I get sepia-html-client-app?
The source code and installation instructions are on GitHub: https://github.com/SEPIA-Framework/sepia-html-client-app

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