GPT Mobile

Chat app for Android that supports answers from multiple LLMs at once. Bring your own API key AI client. Supports OpenAI, Anthropic, Google, and Ollama. Designed with Material3 & Compose.

Mobile App DevelopmentKotlinGPL-3.0

Abstract

GPT Mobile is an open-source Mobile App Development project. Chat app for Android that supports answers from multiple LLMs at once. Bring your own API key AI client. Supports OpenAI, Anthropic, Google, and Ollama. Designed with Material3 & Compose. It is built using Kotlin, Android, Jetpack Compose. Key capabilities include: Chat with multiple models at once; Uses official APIs for each platforms; Supported platforms:. The complete source code is publicly available on GitHub under the GNU General Public License v3.0, making it a useful reference for students building a Mobile App Development mini project or final-year project.

1. Introduction

Chat app for Android that supports answers from multiple LLMs at once. Bring your own API key AI client. Supports OpenAI, Anthropic, Google, and Ollama. Designed with Material3 & Compose.

2. Objective

Chat app for Android that supports answers from multiple LLMs at once. Bring your own API key AI client. Supports OpenAI, Anthropic, Google, and Ollama. Designed with Material3 & Compose.

This project demonstrates how Kotlin, Android, Jetpack Compose can be applied to a real-world Mobile App Development problem.

3. Key Features / Modules

  • Chat with multiple models at once
  • Uses official APIs for each platforms
  • Supported platforms:
  • OpenAI GPT
  • Anthropic Claude
  • Google Gemini
  • Can customize temperature, top p (Nucleus sampling), and system prompt
  • Custom API URLs, Custom Models are also supported
  • Optional agent tools per provider profile
  • Native tool calling with OpenAI, OpenAI-compatible/Groq, Anthropic, and Gemini

4. Technology Stack

KotlinAndroidJetpack Compose

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

  • Android Studio (latest)
  • JDK 17
  • Android device or emulator
  • Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/Taewan-P/gpt_mobile.git
cd gpt_mobile

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

  • Add push notifications with Firebase Cloud Messaging
  • Add offline support with local caching
  • Publish an internal test build on the Play Store

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

  1. Which framework is used and why (native vs cross-platform)?
  2. How is app state managed across screens?
  3. Where is the data stored — locally, Firebase or a REST backend?
  4. How are permissions (camera, location, storage) handled?
  5. How would you publish this app to the Play Store / App Store?

9. Source Code & License

This project is developed by Taewan-P and published on GitHub under the GNU General Public License v3.0. Please follow the license terms and credit the original author when you use or modify this code.

View Source on GitHubDownload ZIP

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