Insights on wearable data,
health AI, and open source.
Articles on building with wearable data, health scoring algorithms, and the Open Wearables platform.
How to Access Google Health Connect Data in Your Backend
There is no Google server-side API for Health Connect. Your Android app must read data on device and upload it. Here's the complete pipeline from setup to production.
Google Health Connect Integration: Android Health Data for Developers
Google Health Connect is Android's on-device health data hub, aggregating data from Wear OS, Galaxy Watch, Fitbit, Garmin and third-party apps. Here's how to build with it.
How to Integrate Suunto Data Into Your Training App
Suunto's altitude metrics and Training Effect scores enable outdoor sport features no other major wearable API covers with comparable depth. Here's how to use them in a product.
Suunto API: Accessing Watch Data for Developers
The Suunto API provides workout data for 80+ sport types with GPS, heart rate, altitude metrics, Training Effect scores and VO2 max. Here's what building with it requires.
Building With Ultrahuman Data: Recovery, Sleep and Glucose
Ultrahuman's combination of ring biometrics and optional CGM glucose data enables product features no other single platform supports. Here's how to build with it effectively.
Ultrahuman API: Ring Data, CGM and Recovery Metrics
Ultrahuman Ring AIR provides Recovery Score, Sleep Score, HRV, skin temperature and movement data. Its CGM integration adds continuous blood glucose alongside recovery metrics.
How to Access Polar Watch Data in Your Health App
Polar's cardio versus muscle load split and ANS Charge from Nightly Recharge enable coaching features that most wearable APIs cannot support. Here's how to use them effectively.
Polar API: Training, HRV and Nightly Recharge Data
Polar AccessLink API provides training sessions for 100+ sport types, HRV4T nightly HRV tracking, Nightly Recharge, sleep staging and VO2 max. Here's what building with it requires.
How to Connect Samsung Health to Your App
The Samsung Health integration pipeline covers developer program application, OAuth 2.0, token management, data querying and normalization before you ship a single product feature.
Samsung Health API: Galaxy Watch Data for Developers
Samsung Health Platform provides server-side API access to Galaxy Watch data including heart rate, sleep stages, workouts, stress score, SpO2, HRV and body composition.
Getting Apple Health Data Into Your Backend
There is no server-side Apple Health API. Getting data to your backend means building an iOS pipeline: permissions, observer queries, background delivery and reliable upload.
Apple HealthKit API: What Data You Can Access and How
HealthKit is an on-device framework, not a remote API. There is no server-side Apple Health endpoint. Here's what's available, how permissions work, and what building an integration really requires.
Garmin API Push Notifications: How Callback Sync Works
Garmin's Health API pushes data to your callback URLs when users sync their devices. Here's how the system works end-to-end and what reliable implementation requires.
Garmin Connect API: Developer Guide for Activities and Health Metrics
Garmin's Health API uses push-based delivery and OAuth 1.0a, covering 100+ sport types, GPS, Body Battery, HRV, sleep and more. Here's what building with it actually requires.
How to Use Oura Ring Data in Your App
Readiness Score, HRV trends and body temperature deviation are Oura's most actionable signals. Here's how to use them effectively in a coaching or wellness product.
Oura API: Accessing Ring Data, Sleep, HRV and Readiness
The Oura Ring API provides Sleep Score, Readiness Score, HRV, body temperature deviation and SpO2 through a clean REST interface. Here's what it offers and how to build with it.
Building a Health App With Whoop API Data
Getting data out of the Whoop API is one problem. Building something users find valuable is another. Here's how to use Recovery Score, HRV trends and Sleep Performance effectively in a product.
Whoop API: Recovery, Strain and Sleep Data for Developers
The Whoop API exposes Recovery Score, HRV, Strain and Sleep Performance through a cycle-based model. Here's how it works in practice and what building with it actually requires.
How to Integrate Strava Without Building OAuth From Scratch
Building a production Strava integration means writing OAuth, token refresh, webhooks and rate limit logic before shipping any product. Here's what that actually takes, and a simpler path.
Strava API Developer Guide: Activities, Heart Rate and GPS Data
A practical guide to connecting Strava's API in production: OAuth token refresh, rate limits, webhooks, and how to normalize activity data across multiple providers.
