Ask your Apple Health
data anything. Answered on your iPhone.

MetricBridge is an iPhone app by Philip D'Souza (App Store ID 6784185201) at healthexport.dev. You ask plain-language questions about your Apple Health data, the answer is computed on your iPhone, and every answer shows the days and samples behind it. It also exports 194 Apple Health and Apple Watch metrics as JSON or CSV and ships a zero-dependency MCP server so agents like Claude, Claude Code, Cursor, VS Code and opencode can read them. MetricBridge is a different product from other similarly named Apple Health export apps and is not affiliated with them.

Not for Ask or the Weekly Brief: both are computed on your iPhone, and your health data is never sent to us or to a cloud AI. It leaves only when you export, and then only to the destination you choose: your iCloud Drive, a folder, your local network or your own server. The app does report which ad led to an install or a purchase, never health data, and only if you allow it when iOS asks. The full list is in the privacy receipt below.

No. Any iPhone on iOS 17 or later works. Guided mode answers without any language model. On iPhone 15 Pro, iPhone 16 and later with Apple Intelligence turned on, Apple's on-device model words the answer. On every other iPhone the app can download a model of about 400 MB once, over Wi-Fi, and run it on the phone. How each mode works and what it needs.

Yes, through Apple Health, with no extra account or server. Turn on Apple Health sharing in Garmin Connect and MetricBridge reads what Garmin writes there: steps, heart rate, workouts, sleep, weight and energy. Garmin doesn't share HRV, resting heart rate or blood oxygen with Apple Health. The readiness estimate needs HRV or resting heart rate, so a Garmin on its own won't give you one. Ask, the export and your AI agent use everything Garmin does share.

Install MetricBridge on iOS and connect Apple Health read-only. MetricBridge exports 194 Apple Health and Apple Watch metrics as clean, structured JSON to a destination you choose (iCloud Drive, a synced folder, your local network, or a webhook) with full units and metadata preserved, so you skip the raw export.xml mess.

An Apple Health MCP server is a Model Context Protocol server that exposes your Apple Health data to AI agents as live tools they can call on demand. MetricBridge ships 22 MCP tools, 20 of them read-only, so agents query your metrics in plain language instead of parsing a static file dump.

After MetricBridge syncs your data locally, connect your agent in one click for Cursor or Claude Desktop, or copy the MCP config for any other client. On a Mac the server finds the app's iCloud folder by itself. It works with Claude Desktop, Claude Code, Cursor, VS Code, opencode, OpenClaw, Hermes, and any other MCP client, with no bridge, no Docker, and no servers.

On your iPhone. When you use Ask or the Weekly Health Brief, the statistics are computed on the device and the language model that phrases the answer also runs on the device. Your health data is never sent to us or to any cloud AI service. On iPhones without a built-in system model, the app can download an optional model file once so it can still run locally. An optional "Your Mac" mode, off by default, lets Ollama on your own Mac word the answer over your Wi-Fi.

No. Ask runs on your iPhone, so there is no API key, no per-question charge and nothing is metered. On iPhones without Apple's built-in model, the app can download a model file of about 400 MB once, over Wi-Fi only. If you also connect your own agent over MCP, that agent's usual pricing applies, for example your Claude or ChatGPT plan; MetricBridge adds nothing to it.

Plain-language questions about your own Apple Health data, such as “compare my HRV this week vs last” or “how has my resting heart rate changed over 90 days”. Every answer shows a provenance strip (the metric, the date range and the sample count) so you can check exactly which days the number was built from. It is wellness information, not medical advice: it describes your own data and how it deviates from your personal baseline, and it does not diagnose, treat or monitor any condition.

One purchase. Everything included. No subscription. A single one-time purchase unlocks full export, all 22 MCP tools, on-device Ask answers with provenance, and the Weekly Health Brief. Nothing renews and there is nothing to cancel. There is a free trial first, and the App Store shows the current price. The MCP server itself is free and open source.

Exports and Ask pause. Reading your data, your settings and the open source MCP server stay free. Unlock once and everything resumes. Nothing is charged automatically because no payment method is ever stored.

All of it. The first export backfills your entire Apple Health history (every day Apple Health holds, going back to your oldest recorded sample) and every export after that keeps it current. Tap “Export all” on the Schedule tab to run it; it reads in bounded batches so it stays within iOS memory limits, shows progress as it goes, and picks up where it left off if you lock your phone (Apple Health cannot be read while the device is locked). The scheduled exports afterwards only need to fetch what is new.

Yes. MetricBridge reads Apple Health and never writes to it, and it is local-first. The MCP server runs on the machine where your agent runs, makes no outbound network calls, and your data only ever reaches the endpoint you configure. There are no accounts, no health telemetry, and nothing is stored on our servers. The iOS app does include advertising measurement (app events such as an install or a purchase, never health data), and iOS asks your permission before anything is sent, so you can decline.