Connects: everything in, everything out
Marrow gathers your health data from every wearable and app, keeps it on your phone, and hands it to the AI and the tools you already use. Three pages in the app, three here: Sources, AI and Exports. Pick yours for the exact steps.
Sources
What comes in. Marrow reads everything in Apple Health, so a wearable or app that writes there is already a source: open Connects, then Sources, and the ones coming in carry a check. The rest are a few taps away, and the brands' own scores are on their way through direct connections.
Wearables
Apps
AI
Two-way. Your AI reads your data over MCP (Cloud, Local or Server) and, once you allow it, logs meals, water, workouts, sleep, symptoms and mood when you ask.
AI assistants
Agents and editors
Automation
Data and dashboards
Exports
One-way. Automations post CSV or JSON to a URL on a schedule with the app closed, dashboards and spreadsheets fill up, and Manual makes a file when you ask for it.
Automation
Data and dashboards
Fitness
See what people make with these on Built with Marrow, with the code to copy.
Five ways out
| Way | What it is | Plan | |
|---|---|---|---|
| Cloud MCP | A private copy of your data on Marrow's server. Your AI reads it any time, phone asleep, and every sign-in is approved on your phone. | Pro | Guide |
| Local MCP | A server on your iPhone. It answers while Marrow is open, to apps on the same Wi-Fi or tailnet. Nothing leaves your network. | Free | Guide |
| Server MCP | Marrow's open-source server on a computer you keep on (a Pi, a NAS, an old laptop). The phone keeps it current and it answers any time. | Free | Guide |
| Automated | Marrow posts CSV or JSON to a URL on a schedule, with the app closed. | Free | Guide |
| Manual | A CSV, JSON or GPX file, made when you ask for it. | Free | Guide |
Free keeps 3 connections on at a time. Marrow Pro keeps up to 20: AIs, servers and automations together. Sources never count. These steps match Marrow 1.6.
Something not working? Each page lists the usual fixes for that app. The guides go deeper: Cloud MCP, Local MCP, Server MCP, Automated and Manual.