Notes recorded on a Samsung Galaxy Watch 8 reach a Google Pixel 9 Pro through Android's built-in sync and are transcribed with Whisper, which runs directly on the phone: fast, free and private, with excellent English and good Italian results. An LLM, guided by a system prompt with a fixed set of allowed actions, picks the right one: add a calendar event, create a note or list, or add items to the shopping list.
The agent never acts on its own. When a note is ambiguous it asks a follow-up question in text, and every proposed action must be approved one by one before it runs.
The model is not hard-wired. Gemini is the default, but the settings accept any Fal.ai model endpoint, with one-tap presets for Claude Sonnet 4.5, GPT-4o mini and Gemini 2.5 Flash, so models can be compared on real notes.