HealthKit Knowledge Base
The missing manual for Apple Health data — built for AI.
A comprehensive reference for over 150+ HealthKit data types — sampling rates, typical ranges, cross-device comparisons, compaction policies. Designed for AI agents, developers, clinicians, and researchers.
Explore Data Types
Browse the complete catalog by category.
28
Activity
Detailed clinical references for activity metrics.
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10
Activity and Heart
Detailed clinical references for activity and heart metrics.
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7
Body Measurements
Detailed clinical references for body measurements metrics.
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6
Characteristics
Detailed clinical references for characteristics metrics.
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2
Correlations
Detailed clinical references for correlations metrics.
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4
Hearing and Environment
Detailed clinical references for hearing and environment metrics.
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9
Lab and Test Results
Detailed clinical references for lab and test results metrics.
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8
Mobility
Detailed clinical references for mobility metrics.
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40
Nutrition
Detailed clinical references for nutrition metrics.
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2
Other
Detailed clinical references for other metrics.
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14
Reproductive Health
Detailed clinical references for reproductive health metrics.
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33
Symptoms
Detailed clinical references for symptoms metrics.
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14
Vital Signs
Detailed clinical references for vital signs metrics.
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