Monolithos is a local-first personal agent for macOS, iOS and Windows. Its memory lives as plain Markdown in a vault on your own disk, so your agent keeps the same memory when you change models. Work you hand to the agent pauses for your approval before anything consequential, and every result is kept as a file you own. The local features, including on-device meeting transcription on Mac, iOS and Windows, are free; only the cloud AI features need a subscription.