This repository is a high-performance React Native library (llama.rn) that enables on-device Large Language Model (LLM) inference on iOS and Android devices. It wraps the C++ llama.cpp core using JavaScript Interface (JSI) and TurboModules, allowing mobile applications to run GGUF-formatted models locally without cloud dependencies. The architecture consists of a TypeScript/JavaScript layer for the React Native interface, a C++ core for inference and model loading, and native modules for Android (Java/Kotlin) and iOS (Objective-C++). Key capabilities include hardware acceleration via Apple Metal and Qualcomm Hexagon DSP, multimodal support (vision/audio), parallel decoding, and structured output generation. The project includes a comprehensive example app demonstrating chat interfaces, model management, and benchmarking tools.