Capella Speech – Fluency Activities App

English | 中文

This app is developed by Capella Speech (capella-speech.org), a student-led organization raising awareness of speech impairments and curating resources for the community. Our goal with this app is to promote speech fluency for people who stutter through well-established practice activities and educational resources.

Important: This app is not a clinical tool and is not a substitute for professional evaluation or therapy. If you are seeking clinical care, please consult a licensed speech-language pathologist.

What’s in the app

• Choral Speaking: Speak along with a reference voice to leverage the well-known choral speech effect, which can temporarily increase fluency for many people who stutter. You control the content and pacing.
• Delayed Auditory Feedback (DAF): Hear your own voice with a short delay, a technique that can change speech rate and rhythm. The app provides adjustable delay settings.
• Flashcards: Practice structured word and phrase lists with adjustable prompts. Designed for repetition and gradual difficulty.
• Paced Speaking (in progress): A metronome-like activity to encourage rhythmic speech pacing. Note: This activity is currently incomplete and may change.
• Story Chain: Collaborative storytelling that encourages longer utterances in a low-pressure format.
• Resources: Curated educational links and materials related to stuttering, therapy approaches, and community support.

Again, these activities are for education and practice only—they are not medical treatment.

Project background

• The original Capella app was implemented in Swift for iOS.
• This repository is a newly updated rewrite in React Native (Expo) for cross-platform compatibility (iOS, Android, and web where feasible).
• On iOS, DAF uses a native audio module bridged to React Native for low-latency processing (see ios/Capella/DAFModule.swift and native-modules/DAFModule.ts).

Getting started

1. Install dependencies

   npm install

2. Start the development server

   npx expo start

Then open the app in one of the following:

• Development build
• Android emulator
• iOS simulator
• Expo Go (feature-limited, best for quick previews)

Project uses file-based routing; see the app/ directory for screens and activities.

Tech overview

• React Native (Expo), TypeScript
• Native iOS audio module for DAF (Swift, bridged through Objective‑C)
• Internationalization via i18n/ with English and Chinese locales
• Assets under assets/ including icons and word-bank data

Contributing

Contributions are welcome. Please open an issue or pull request. By contributing, you agree that your contributions may be used under the project’s license.

License

MIT