Health Data Consent

This document explains how Taylor uses your Apple Health data, what we do and don't do with it, and how you can control or revoke access at any time.

What Health Data Taylor Reads

When you grant permission through Apple's HealthKit permission dialog, Taylor may read:

Activity

• Step count, distance walked/run
• Active energy burned, exercise minutes, stand hours
• VO2 max estimates

Heart

• Resting heart rate, walking heart rate
• Heart rate variability (HRV)

Body measurements

• Weight, height, BMI
• Body fat percentage (if available)

Sleep

• Time in bed, sleep duration, sleep stages (if available)

Nutrition

• Dietary energy, protein, carbohydrates, fat (if logged in Health app)

Taylor reads only the data categories you explicitly approve. You choose at the permission prompt which categories to allow.

Why We Need This Data

Your Apple Health data is the foundation that makes Taylor's coaching specific to you rather than generic. Without activity and biometric data, the AI coach can only give generic advice.

Specifically, we use it to:

• Track your progress toward fitness and wellness goals
• Calibrate workout intensity recommendations based on your fitness level
• Surface insights like sleep-recovery correlations, HRV trends, and activity streaks
• Ground AI responses in your actual data ("based on your last 7 days of activity…")

On-Device Processing

Your health conversations and AI inference run on your iPhone — not on our servers.

Taylor uses Apple's MLX framework to run the AI model locally. When you ask Taylor about your health data, the query is processed on-device. Your raw health records are never uploaded to our servers for AI processing.

Summary metrics (e.g., 7-day average step count) may be stored in our database to power longitudinal features like progress charts and coaching history. These are encrypted with per-user keys.

Data Governance

What	How
Storage	Supabase (PostgreSQL, EU region, AES-256 at rest)
Transit	TLS 1.3
Access control	Row-Level Security — your data is isolated from other users
Third parties	Not shared with advertisers, data brokers, or resellers
Model training	Not used to train AI models without explicit opt-in consent

Revoking Access

You can revoke Taylor's HealthKit access at any time:

1. Open Settings on your iPhone
2. Tap Privacy & Security → Health
3. Tap Taylor
4. Toggle off any or all data categories

Revoking access does not delete historical data already synced. To delete all stored health data, submit a deletion request at /legal/data-deletion.

Your Consent

By granting HealthKit permissions, you consent to the collection and processing of your health data as described in this document and our Privacy Policy. This consent is voluntary — the App's non-health features (settings, account management) continue to work if you deny Health access.

Contact

Questions about health data: privacy@lifealteringtaylor.com