Week 31, 2026
Jul 27 – Aug 2, 2026 · generated from the record, not written from memory
Fitness and health APIs, Jul 27 – Aug 2, 2026: 4 SDK or library releases and 45 new pages.
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SDK and library releases
- · Release date from sdkReleases.tsreact-native-health-connect v4.1.2
- · Release date from sdkReleases.tsreact-native-health-connect v4.0.0
- · Release date from sdkReleases.tsreact-native-health-connect v4.1.0
- · Release date from sdkReleases.tsreact-native-health-connect v4.1.1
New on this site
Architecture (14)
- Background Sync That Does Not Depend on the Phone Waking Up
- Deleting and Exporting a User's Health Data
- Monitoring a Health Data Pipeline for Silent Failures
- Deduplicating Health Data From Multiple Sources
- Backfilling Years of Wearable Data Without Hitting Rate Limits
- Mapping Users to Wearable Provider Accounts and Devices
- Incremental Sync: Reading Only What Changed Since Last Time
- Versioning Derived Metrics and Recomputing Health History
- Missing Data and Gaps in Health Metrics
- Normalizing wearable data across providers
- Resolving Sync Conflicts in an Offline-First Workout Log
- How Should You Store Health Time-Series Data?
- Timezones and Day Boundaries: Whose Midnight Defines the Day?
- Webhook ingestion for health data: making at-least-once delivery safe
Testing (14)
- Testing Background Sync: Three Tests, and Only One Is Real
- Testing Camera Features When You Have No Camera
- Testing That a User's Health Data Is Actually Deleted
- CI for an App That Needs a Real Device
- Test Data for Health Connect: Fakes, the Toolbox, and the Generators You Write
- How to Test a HealthKit Integration
- Mock Wearable Data That Is Ugly Enough to Find Bugs
- Testing an OAuth Integration: The Token Lifecycle, Not the Login Screen
- Testing Offline Sync and Conflict Resolution
- Testing Pose Estimation Accuracy with a Regression Corpus
- Provider Sandboxes: Build the Fake, Keep One Real Account
- Testing 429 Rate-Limit and Outage Handling in a Health Backfill
- How to Test a Rep Counting Algorithm
- Testing Webhooks Locally: Replay Signed Payloads, Not Just the Handshake
AI Features (10)
- What Does an AI Fitness Feature Cost to Run?
- Writing the System Prompt for an AI Fitness Coach
- AI Food Logging: Text and Photo Nutrition Entry That Actually Works
- AI vs Rules-Based Coaching: Where a Language Model Actually Helps
- AI Workout Plan Generation: How to Build One That Ships
- Choosing an LLM for a Fitness App: Pick by Job, Not by Leaderboard
- How to Evaluate an AI Fitness Feature
- Grounding an LLM in Your Exercise Database
- Guardrails for an LLM That Gives Fitness Advice
- Personalizing Your App With a User's Own Wearable Data