# Teo > Free Apple Watch app that turns your Apple Watch into a Garmin + WHOOP. Readiness scoring, guided workouts, cardiac load, GPS — built with on-device HealthKit. iPhone companion app included. Teo is a standalone watchOS app with an iOS companion for training readiness and live run tracking. All health data stays on device. No servers, no accounts, no data collection. ## About - [About Teo](https://trainwithteo.com/home.md): Long-form markdown summary of what Teo is, what it does, the sports-science foundations, and the platforms it ships on. - [Website](https://trainwithteo.com/): Marketing site with screenshots and full feature list. - [Privacy Policy](https://trainwithteo.com/privacy): Data handling (short version: everything stays on device). - [Terms of Service](https://trainwithteo.com/terms): Standard ToS. ## Blog - [HRV: what actually moves it, and what doesn't](https://trainwithteo.com/blog/hrv-what-actually-moves-it.md): Heart rate variability is the most mis-used recovery metric on the market. Here's what the research says actually shifts it night-to-night — and what's just noise. (Sports Science, 9 min read) ## Feeds - [RSS feed](https://trainwithteo.com/blog/feed.xml): Full blog feed in RSS 2.0. - [Sitemap](https://trainwithteo.com/sitemap.xml): XML sitemap of all indexable pages. - [llms-full.txt](https://trainwithteo.com/llms-full.txt): Entire site concatenated into one markdown document. ## Contact - Email: sante@hey.com - X: https://x.com/trainwithteo - TestFlight: https://testflight.apple.com/join/6ngDhSpv