Say It Again

Native Android application for audio transcription with real-time playback sync and vocabulary management.

The idea to create this application emerged one day when the author of this project (me) was listening to a podcast to practice listening skills and couldn't fully understand the topic. The lack of podcast audio transcription and podcast/transcription-related applications not meeting expectations contributed to the idea of creating software that allows users to transcribe anything by uploading their own audio/video, creating a transcription, and following along with the transcript while listening to the audio with the ability to save unknown words to learn.

Note: The application is still under development and lacks several key features.

Screenshots

Design

View the UI design on Figma.

Features

• Picking audio to transcribe (planned)
• Audio transcription with a speech-to-text API (planned)
• Displaying transcription while playing audio with the ability to save vocabulary (planned)
• CRUD Room database for saved vocabulary (production-ready)
• Internet connectivity tracker (production-ready)
• Bulk-exporting saved vocabulary by generating a CSV file with a backend service (production-ready, see Say It Again Backend repository)
• Saving a CSV file directly to the device (production-ready)
• Sending a CSV file to user's email address (planned)

Minor improvements in the future:

• Splash screen with animated content
• Custom illustrations (the current ones come from undraw.co)

Modularization

The project was divided into Android modules to improve the overall structure.

• app - Main application module with MainActivity and ApplicationClass
• common - Shared models, interfaces, and utilities used across all modules
• scaffold - Application-level navigation and main UI structure
• feature:home - Home screen functionality and UI
• feature:saved - Saved words management, export functionality, and related screens
• feature:transcribe - Audio transcription functionality (currently in development)
• localData - Local database operations using Room, DAOs, and data sources
• remoteData - Network operations, API endpoints, and remote data handling
• connectivity - Network connectivity monitoring and status management
• ui - Shared UI components, themes, and design system elements

Module-level dependency graph:

Technologies Used

Android:

• SAF (Storage Access Framework)
• ContentResolver
• ConnectivityManager

Kotlin:

• Kotlin Flow and Coroutines
• Kotlin Serialization
• Extension Functions
• OOP (data, sealed, interface, abstract)
• Generics

Jetpack Components:

• Jetpack Compose
• Navigation Compose
• Room Database
• ViewModel
• Hilt

Networking:

• Retrofit
• OkHttp
• Gson
• JSON Serialization/Deserialization

Testing:

• JUnit
• MockK
• Turbine (Flow testing)
• MockWebServer

Programming Methodologies

• Multi-module architecture
• Single-activity pattern
• Dependency Injection (DI)
• MVVM (Model-View-ViewModel)
• MVI (Model-View-Intent)
• Event-Driven Architecture (EDA)
• SOLID principles
• Repository pattern