Apple Health export · free and open source
Hozz carries your Apple Health records from your iPhone to places you own — your Mac, a folder, your dashboard, database, endpoint, or broker.
No account. No subscription. No Hozz cloud. Nothing leaves until you add a destination and confirm it.
What Hozz can read
Hozz keeps HealthKit’s real type names intact. Each example below is drawn from the data the app handles; the reading beside it is an example, never a claim about a person.
heartRateVariabilitySDNN48 msRate, variability, ECG, resting and walking averages
stepCount8,241Steps, distance, energy, exercise minutes, workouts
dietaryProtein112 gEverything you log to eat and drink, down to the micronutrient
walkingAsymmetryPercentage1.2%Walking speed, step length, asymmetry, stair speed
oxygenSaturation97%Blood oxygen, respiratory rate, peak flow, VO₂ max
bodyMass178.4 lbWeight, height, body fat, lean mass, temperature
sleepAnalysis7h 12mEvery stage, every night, from wherever you record it
mindfulSession10 minMindful minutes, state of mind, time in daylight
basalBodyTemperature97.9°FTracking, symptoms, basal temperature, test results
headphoneAudioExposure68 dBHeadphone and environmental audio exposure
Six destinations · no middleman
Every route ends at somewhere you control. Each destination keeps its own Health types, schedule, and place in the queue.
Run the companion Mac app and your phone finds it on your own network — no address to type.
_hozz._tcp · :54330iCloud Drive, Dropbox, OneDrive, Google Drive, SMB, or on the device.
Files pickerMetrics land on your own dashboard as a webhook or REST call.
Metrics JSONYour endpoint, your format. Hozz posts and retries safely.
POST · NDJSON / JSON / CSV / Metrics / line protocolLine protocol written straight in, so Grafana needs no translator.
/api/v2/write · 1.8 /writePublished to your own broker for anything else you run.
mqtt:// · mqtts:// · QoS 0Seven open forms
Pick the shape the next tool needs. Hozz says when a format keeps every field and when it deliberately leaves detail behind.
| Format | Good for | Fidelity |
|---|---|---|
| NDJSON | The default. One record per line, streamable. | Lossless for encoded fields |
| SQLite | Query it in Datasette, DuckDB, pandas or Grafana. | Lossless — every row keeps its original record in raw |
| JSON | One document, whole records. | Lossless |
| CSV | Spreadsheets and quick charts. | Lossy — a grid cannot hold metadata or nested workout detail |
| Markdown | One note a day, for Obsidian and journals. | Lossy — a day’s totals, never the records behind them |
| GPX | One track per workout with GPS, for maps. | A filter, not a projection — routes only |
| Metrics JSON | Dashboards, Home Assistant and MQTT. | Values over time |
How to export Apple Health data
Nothing starts in secret. You choose a destination, choose what it receives, and choose when it runs.
Your Mac, a folder, Home Assistant, InfluxDB, a URL, or MQTT. Test it before you trust it.
Per destination: which Health types, and how often — on arrival, hourly, daily or manual.
New records go on their own. Each destination keeps its own place in the queue.
Nothing leaves your phone until you add a destination and confirm it.Hozz has no default destination and no hosted relay to receive a copy.
A current that keeps its place
Each Health type advances only after its records are durably staged. An interruption can repeat work; it cannot skip records.
HKAnchoredObjectQueryEach type has its own opaque anchor, advanced only once records are durably staged.
checkpointedQuit it, reboot, background it. A manual export carries on from its last checkpoint.
Idempotency-KeyContent-derived ids mean the same record twice is still one record.
quarantine · promotionA record this version cannot parse is quarantined, then added once a newer one can read it.
Private by construction
Hozz’s privacy story is not a policy wrapped around a service. It is the absence of the service that would collect your data.
Nothing held back for a Pro tier.
Nothing to sign up to.
No telemetry, no ads, no crash payloads.
No relay in the middle.
Nothing leaves until you add one.
Your keys stay in that device’s Keychain.
Hozz will never write anything back into Apple Health. Re-importing would erase where a record came from and could silently create duplicates.
Project state · early alpha
Hozz is not in the App Store yet. One developer is building it in the open, and the repository is available now.
Plain answers
Yes. Free and open source under GPL-3.0, with no subscription, no account and no paid tier planned.
Only where you send it. There is no default destination and no server of mine — nothing leaves your phone until you add a destination and confirm it.
Yes. iOS decides when background work runs, so most types land near hourly, and Health cannot be read while your phone is locked.
On your Mac, yes. Hozz ships a read-only MCP server that reads the database your phone keeps current, so a question costs a lookup rather than re-parsing a stale XML export. It cannot change or delete anything — but a cloud assistant may upload whatever it reads, which is the assistant’s behaviour, not Hozz’s.
No, and it never will. Health stamps every sample with the app that wrote it, so a reading your Watch took in 2019 would come back indistinguishable from one Hozz invented — which destroys the provenance an archive exists to protect. HealthKit also has no way to say “store this unless it is already there”, so importing twice would silently double everything.
Because it would be invented. Health will not say how many records a type holds without reading all of them, so Hozz reports how many types are complete and how far back they reach, and never shows a fraction it cannot know.
Free forever · open source
Hozz is open source so you can read how it works before trusting it with anything.