Marrow: Health Export & AI

Marrow is the best app for keeping all your health data securely in one easy-to-read place.

It reads from 25+ apps and devices and has its own nutrition and fitness logging as well. From there, you choose where to send your data using AI, MCP, automations or manual exports.

DATA SOURCES

Anything that writes to Apple Health can be read into Marrow, and the Sources page tells you which apps and devices are sending data. Hevy and Intervals.icu can also connect directly with an API key.

Marrow reads 170+ Apple Health data types: steps, heart rate, HRV, sleep stages, blood oxygen, respiratory rate, body composition, cycle tracking and more.

WHAT YOU LOG

Meals: take a photo, say it or type it, and Marrow fills in the nutrition. There's a barcode scanner too, and a food database built into the app, so quick search works without internet. Each meal tracks 39 nutrients.

Workouts: tell Marrow what equipment your gym has, and it builds a lifting program around your days and goals. You can easily track your progress on each lift across 750+ exercises and see how you're improving. You can also track cardio and other workouts.

You can log water throughout the day, and your weight too.

With an MCP connection, you can also log all of this just by talking to your AI.

DATA EXPORTS

Connect Claude, ChatGPT, Gemini, Grok, Perplexity, Le Chat, Claude Code, Codex, Cursor or any MCP client, and your AI can read and write your data, based on your permissions, with 20+ tools. With this data, you can get personalized insights on how to improve your health and reach your goals.

Automations send CSV or JSON on a schedule, even with the app closed, to n8n, Zapier, Make, Home Assistant, Google Sheets, Grafana, InfluxDB or any webhook URL. You can also export a file whenever you want one (CSV, JSON or GPX).

People have built dashboards and other projects on top of it. You can see them at marrowhealthapp.com/built-with.

ALSO IN THE APP

A body map showing which muscles you're working. Logging streaks. Custom daily notifications based on your goals. An Apple Watch app for quick logging, plus Home Screen and Lock Screen widgets.

SUBSCRIPTION AND TERMS

Marrow is available for free, with the option to upgrade to Marrow Pro through an auto-renewing subscription or a lifetime purchase. Subscriptions can be canceled at any time in your Apple ID settings.

PRIVACY

There's no account, and there are no ads or trackers. The only outside SDK is RevenueCat, which handles purchases and never sees health data. Your health data stays on your iPhone unless you send it somewhere (a connection, Cloud MCP or an AI log), and the app makes it clear when that happens. Otherwise, all of your data is stored locally on your phone, where only you can see it.

Requires iOS 17 or later and Apple Health.

Marrow is a wellness app, not a medical device. It doesn't diagnose, treat or prevent any condition. Talk to your doctor before making medical decisions.

Privacy Policy: https://marrowhealthapp.com/privacy
Terms of Use: https://marrowhealthapp.com/terms