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Screens showcasing Arbiter, the on-device AI assistant
Early Access
iOS · Local LLM Assistant

Arbiter

1,000+ downloads · Built solo in ~3 months · Live on the App Store

Privacy-first offline AI assistant for iPhone. Every conversation stays fully on-device with no data ever leaving the phone. Swap between open-source models tailored to your workflow or needs.

  • Real-time web search to augment on-device generation
  • Support for reasoning models, vision models, and file analysis
  • Siri integration with background execution optimizations
  • Runs quantized LLMs via MLX framework and a llama.cpp Swift wrapper
SwiftSwiftUICore MLMLXllama.cppFirebase