Export your Apple Health data to destinations you own — your Mac, a folder, Home Assistant, and more. No accounts, no analytics, no server in the middle.
Hozz is a free, open-source iPhone app with a companion Mac app. The phone reads the Health data Apple lets an app read and sends it — on demand, or automatically in the background — to places you control: your own Mac, a folder in iCloud/Dropbox/anywhere, Home Assistant, InfluxDB, an MQTT broker, or any endpoint you run. The Mac app receives those deliveries, stores them in a local database, charts them, and can even answer questions about them through an AI assistant.
There is no subscription, account, analytics, advertising, or hosted relay. Nothing leaves your iPhone until you add a destination and confirm it — Hozz ships with no default destination and never picks one for you.
Early alpha. Hozz is honest about what it does and doesn't do yet. Where a Health data type isn't supported, it says so plainly rather than quietly pretending it was exported. See What Hozz keeps, and its limits below.
- Automatic background sync. Turn it on and Hozz keeps your destinations up to date as new Health data arrives — when data comes in, hourly, daily, or only when you ask.
- Fair first sync. The first sync works through your history a bit of every selected type at a time, so a phone with years of stand hours doesn't sit on everything else for days.
- One-tap manual export. Build a full historical export you can save or share from the phone. It's resumable: a pause, a reboot, or a force-quit picks up from the last checkpoint instead of starting over.
- Honest progress. The phone tells you how many selected types are complete and the Mac tells you how far back the data reaches — never a fake percentage, because Health won't say how many records a type holds without reading them all.
- Shortcuts & Siri. Sync Health Data and Check Health Sync Status are exposed as Shortcuts actions.
- Your Mac. The companion Hozz Mac app receives deliveries over your local network, with token authentication and automatic discovery — no typing an IP address.
- A folder. Write batch files through the Files picker into iCloud Drive, Dropbox, OneDrive, Google Drive, an SMB share, or on-device storage.
- Home Assistant. Post metrics to a webhook or REST endpoint.
- InfluxDB. Write line protocol straight to InfluxDB (2.x or 1.8) for charting in Grafana, with no translator container in between.
- Any web endpoint. POST NDJSON, JSON, CSV, metrics JSON, or InfluxDB line protocol to a server you run.
- MQTT. Publish to an
mqtt://ormqtts://broker. - Test before you trust it. Every destination can be limited to selected Health types, turned off, and tested before you rely on it, and each shows its last successful delivery and any attention state.
- Health Auto Export compatibility. An opt-in field-name mode for the Home Assistant, web, and MQTT metrics-JSON deliveries, for arriving with automations already keyed to those names. Hozz's own schema stays the default.
Manual exports come in the shape that suits what you want to do with them:
- NDJSON — the default: one record per line, streamable and lossless.
- JSON — a single array, handy for smaller exports and tools that want one JSON value.
- CSV — one file per Health type, opens in any spreadsheet (lossy by nature — a grid can't hold nested details).
- SQLite — a ready-to-query database for Datasette, DuckDB, pandas, Grafana,
or
sqlite3, with every original record preserved in arawcolumn. - Markdown — one note per day with YAML front matter for Obsidian/Dataview (keeps a day's totals, not the raw records).
- GPX — one track per workout that has GPS, for maps and fitness tools.
Every delivery format is documented field by field, with example payloads, in
docs/delivery-schema.md — so you can build
against Hozz without reading the source.
- A local receiver and browser. The Mac app stores accepted deliveries in a local SQLite database, dedupes them, and never phones home.
- See what's arrived. Browse what's been received and how far back it reaches, with your own characteristics shown above the measurements.
- Charts. Plot any numeric type by hour, day, week, or month, and export a type as CSV.
- Folder watching. Point the phone at a synced folder and the Mac at the same folder, and it ingests new files automatically — handy when the local network refuses inbound connections.
- A dependency-free script, too. A single-file Python receiver lives in
receiver/for anyone who'd rather run a script than the app.
- A read-only assistant. The Mac app embeds a local, read-only MCP server, so an AI assistant can answer questions against a database that's always current — no re-parsing a giant XML export each time.
- Built not to overstate. Trends report "no detectable change" when the data
doesn't support one and refuse below two weeks; correlations show their
uncertainty; anomaly checks report "the device wasn't worn" rather than calling
a gap a low reading. The full list of what each tool will and won't claim is in
docs/mcp.md.
- Nothing leaves without your say-so. No default destination, no telemetry, no relay the maintainer runs.
- Credentials stay on your device. Destination secrets live in the device Keychain and are not synced.
- Health files are protected. Health-derived files use complete-unless-open file protection and are excluded from device backups.
- Logs never contain your data. Diagnostics record statuses and failure states, never Health values, credentials, or response bodies.
Hozz is an early-alpha, non-commercial project and isn't on the App Store yet, so today you build it yourself from source with Xcode. See CONTRIBUTING.md for setup.
You'll want:
- An iPhone running iOS 17 or newer for the app.
- Optionally, a Mac running macOS 14 or newer for the companion receiver, browser, charts, and assistant — or any of the other destinations above instead.
Hozz's honesty is a feature. It currently exports quantity and category samples, workouts and Health's workout statistics, paged workout routes, ECGs with voltage waveforms, audiograms, State of Mind entries, medication dose events, historical deletions, and the six Health characteristics. Some things it catalogues or reports as unsupported rather than silently claiming as coverage:
- Background delivery is limited by iOS, and Hozz says so. iOS decides when background work runs, most Health types are capped at hourly delivery, Health can't be read while the phone is locked, and force-quitting Hozz stops launches until you reopen it. Hozz reports those states instead of calling them success.
- Workout ↔ sample links are an approximation. HealthKit can't tell a sample which workout it belonged to, so Hozz matches by time range and is upfront that overlapping workouts and stray background samples can be misattributed. A workout's own statistics are exact.
- Clinical (health) records are off by default. The code to read FHIR records from a connected provider is compiled out of the default build, on purpose. Enabling it is a deliberate, documented two-step change — see CONTRIBUTING.md.
- Hozz doesn't write back into Apple Health. That's a decision, not an oversight: Health would permanently stamp restored data as Hozz's, has no way to avoid duplicating on re-import, and can't accept characteristics or clinical records at all. Exporting somewhere you own has none of those problems, and that's the direction Hozz works in.
The full per-type coverage table, the durability guarantees behind "does not lose records," and the clinical-records details are in CONTRIBUTING.md.
Please open a GitHub issue. Because Hozz never sends your Health values anywhere you didn't configure, please don't paste Health sample values into an issue. See CONTRIBUTING.md for more.
Build instructions, the test suite, the durability and anchoring design, the Mac
app's networking gotchas, and how to enable clinical records all live in
CONTRIBUTING.md. Wire formats are in
docs/delivery-schema.md and the assistant tools in
docs/mcp.md.
Hozz is free and open source, and it has no paid features. Donations are entirely optional and support continued development of Hozz and Brandon's other free, open-source apps. Anything is appreciated, and not donating is completely fine.
Hozz reads from Apple Health (HealthKit) on your device. Apple, Apple Health, and HealthKit are trademarks of Apple Inc.; Hozz is an independent project and is not affiliated with or endorsed by Apple. Your Health data is yours — Hozz just helps you move a copy of it somewhere you own.
GPL-3.0, with an additional permission for Apple App Store distribution © 2026 Brandon Moore
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