Sherpa Voice
Developer Tools
Free · Designed for iPad. Not verified for macOS.
Try 10 on-device speech and audio AI features — speech recognition, TTS, speaker ID, and more. Fully offline, open source. Built for developers exploring mobile AI.
Sherpa Voice is an open-source demo app that showcases what on-device speech and audio AI can do — directly on your phone, with no cloud and no internet required.
Whether you are a developer evaluating libraries for your next app, a researcher exploring mobile inference, or just curious about offline AI, Sherpa Voice lets you try 10 speech and audio features hands-on.
WHAT YOU CAN TRY
- Speech Recognition: Transcribe speech to text from files or live microphone input. Multiple languages supported.
- Text-to-Speech: Generate natural-sounding speech from text with various voices and speakers.
- Voice Activity Detection: Detect speech vs silence in real-time audio.
- Keyword Spotting: Listen for custom keywords without full transcription.
- Speaker Identification: Recognize speakers by their voice.
- Speaker Diarization: Figure out who spoke when in a conversation.
- Audio Tagging: Classify sounds — music, speech, environmental noise.
- Language Identification: Detect which language is being spoken.
- Speech Enhancement: Remove background noise from recordings.
- Punctuation: Add punctuation to raw transcripts.
Each feature comes with a downloadable model catalog so you can compare different models for speed, size, and accuracy.
FOR DEVELOPERS
Sherpa Voice is built with React Native and Expo using two open-source libraries:
- sherpa-onnx: C++ inference engine for speech models, with mobile-optimized ONNX Runtime
- expo-audio-stream: Real-time audio recording, analysis, and visualization for React Native
Everything you see in this app can be integrated into your own project. The full source code is available on GitHub — use it as a reference, fork it, or contribute.
HOW IT WORKS
1. Pick a feature (Speech Recognition, TTS, etc.)
2. Download a model from the built-in catalog (one-time, typically 15-100 MB)
3. Use the feature — all processing runs locally on your device
PRIVACY
No accounts. No tracking. No data collection. Audio never leaves your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Arthur Breton, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Arthur Breton
- Size
- 62.8 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Siteed