Open Source Kotlin ChatGPT Apps

AI Hub is an open-source Android application that combines multiple AI assistants within a single, customizable interface. Built with Kotlin, it uses integrated webviews to access different AI services without switching between separate applications. Its tabbed navigation maintains persistent sessions and conversations across application restarts. Users can reorder, hide, or disable individual assistants to personalize their workspace. A Material You interface provides dynamic colors and automatic light or dark mode switching. Adjustable font sizes improve readability across different screen sizes. Built-in ad and tracker blocking uses the StevenBlack hosts list to restrict unwanted connections. AI Hub emphasizes privacy by avoiding analytics, telemetry, crash reporting, and personal information collection while delivering a lightweight mobile experience.

Aiyo is a free, open-source Android AI chat application that allows users to access hundreds of language models through their own OpenRouter API key. It provides a simple interface for communicating with different AI models without requiring a separate application for each provider. Users can choose from more than 500 models available through OpenRouter. The application supports conversational interactions, reasoning capabilities, and web searches when supported by the selected model. Chat history allows users to revisit previous conversations. Aiyo emphasizes privacy and states that the application does not collect user data. Built with Kotlin and Jetpack Compose, it follows a modular MVVM architecture. It supports Android 7.0 and newer.