# Health Assistant Link > Health Assistant Link is a free iOS app that connects Apple Health and Home Assistant. It brings your Apple Health and Apple Watch data into Home Assistant as entities (sensors) so you can use your health and fitness data in dashboards and smart home automations. It is free to use, with an optional paid upgrade that enables automated background syncing. It is private by design — data syncs directly to your own Home Assistant instance with no cloud in between. ## Key facts - Product: Health Assistant Link (iOS app) + Health Bridge (Home Assistant integration installed via HACS). - What it does: syncs Apple Health / Apple Watch data into Home Assistant as entities. - Two-way sync: it can also write supported metrics from Home Assistant back into Apple Health (for example, logging weight from a Home Assistant scale into Apple Health). - Example metrics: sleep duration, deep sleep, light sleep, awake time, fall-asleep time, wake-up time, active calories, distance, exercise time, heart rate, blood oxygen, step count. - Pricing: free to use with manual syncing; optional paid subscription unlocks automated background syncing. - Privacy: local by design, no cloud data sharing. - Setup: install the Health Bridge integration via HACS, install the iOS app, link them with a secret token, then sync. ## Pages - [Home](https://healthassistantlink.com/): What Health Assistant Link is, setup steps, and download links. - [User Stories](https://healthassistantlink.com/stories/): Real-world setups using Apple Health data in Home Assistant. - [How I Use Sleep Data in Home Assistant to Help Me Sleep Better](https://healthassistantlink.com/stories/sleep-data/): A user story on syncing Apple Health sleep data into Home Assistant to build dashboards and automations (walk reminders, earlier wind-down) that raised average sleep from ~6.5 to ~7 hours. - [Logging My Weight to Apple Health from Home Assistant](https://healthassistantlink.com/stories/weight-to-apple-health/): A user story on using two-way sync to write weight from Home Assistant back into Apple Health, keeping Home Assistant as the hub while still getting Apple Health graphs and trends. ## Links - iOS App (App Store): https://apps.apple.com/us/app/health-assistant-link/id6745420767 - Home Assistant integration (HACS): https://my.home-assistant.io/redirect/hacs_repository/?category=integration&repository=health_bridge&owner=gregt1993 - GitHub / setup guide: https://github.com/gregt1993/Health_Bridge