Managing Thyroid Disease with 9.5 Years of Apple Watch Data

One of the most compelling health use cases for Claude Code: a developer with thyroid disease used 9.5 years of Apple Watch data to build a predictive health monitoring system.

What Happened

• Fed Claude Code nearly a decade of Apple HealthKit data
• Asked it to find patterns that precede thyroid flare-ups
• Claude identified the optimal ML model for the dataset
• The model detected oncoming flare-ups 3+ weeks before lab results confirmed them

The iOS App

• Claude Code generated an Xcode project from a basic specification
• Reads from Apple HealthKit in real-time
• Runs daily inference on new health data
• Displays a risk dashboard with early warning indicators

Why This Matters

• If used in real-time, the user could contact their endocrinologist weeks earlier
• Potentially avoid months of symptoms through proactive medication adjustment
• Demonstrates Claude Code's ability to handle complex data science workflows end-to-end

Caveats

• This is a personal project, NOT medical advice
• Results are specific to one individual's data
• Requires years of consistent health data for meaningful patterns
• Always consult healthcare professionals for medical decisions