Ranni, the Desktop AI Agent That Builds Little Apps

Why it surfaced

Its strongest idea is unusually concrete: ask for a ledger, weight tracker, or Snake game and Ranni builds an app you can keep opening and revising. The site also foregrounds permission prompts, project-directory isolation, sandboxed apps without network access, inspectable tool calls, and an OpenAI-compatible API.

Ranni is a macOS and Windows desktop agent that can read files, run commands, control local applications, and turn plain-language requests into runnable local apps.