V1.0.0
V1.1.0
Note that this is still an work in progress so there might still be some bugs. I'll try to fix them as soon as possible
Sigma Agent is an autonomous AI coding agent built for Android. It is a native Android application that puts multiple large language models at your fingertips through a unified chat interface, paired with a built-in file manager, terminal-style code editor, and conversation management system. The app is designed for developers and power users who want to interact with AI models from OpenRouter, Google Gemini, local Ollama instances, or any custom OpenAI-compatible endpoint — all while keeping their data secure on-device.
The APK is a self-contained Android application. Everything runs locally on your phone: your conversations, your files, and your API keys. Data is only sent to AI providers when you explicitly send a message.
Click the badge above or download directly:
https://raw.githubusercontent.com/ermwhatesigma/SigmaCode/main/SigmaCode.apk
- Download the APK to your Android device
- Open the file (you may need to allow "Install from unknown sources" in Settings)
- Launch the app and add your API keys in Settings
| Feature | Description |
|---|---|
| Multi-Provider AI Chat | OpenRouter, Google Gemini, Ollama (local/LAN), and custom OpenAI-compatible endpoints |
| Terminal-Style UI | Dark cyberpunk theme with green accents and Material You components |
| Code Editor | Syntax highlighting with tab support for multi-file editing |
| File Manager | Browse, read, and edit local files on your device |
| Memory System | System prompts and customizable personalities per conversation |
| Secure Storage | AES-256-GCM encrypted API keys via Android Keystore |
| Image Support | Attach and send images with your prompts |
| Conversation Management | Pin, rename, delete, and organize chat histories |
- OpenRouter — Preloaded with free models (Nemotron, Mistral, Llama, etc.)
- Google Gemini — Native Gemini API integration
- Ollama — Connect to local or LAN-hosted Ollama instances
- Custom OpenAI — Any OpenAI-compatible endpoint with custom base URL
- Open the app → Settings → API Keys
- Add your provider keys:
- OpenRouter: Get key at openrouter.ai/keys
- Gemini: Get key at aistudio.google.com/app/apikey
- Ollama: Leave key blank, set base URL (e.g.,
http://192.168.1.100:11434) - Custom: Enter key and full base URL
Keys are encrypted with AES-256-GCM via Android Keystore and never leave your device.
| Chat | Models | Settings |
|---|---|---|
 |  |  |
- API keys encrypted with Android Keystore (AES-256-GCM)
- Biometric authentication optional
- No telemetry or analytics by default
- All data stays on device
- Android 8.0+ (API 26)
- Internet connection for cloud providers
- Local network access for Ollama LAN mode
None
- OpenRouter for universal AI API access
- Ollama for local model hosting