Correlate - Health Insights

Find what really drives your sleep, energy and recovery — no extra wearable or subscription needed. New: slide any chart to read exact values, with more accurate sleep.

Recovery. Strain. Sleep. Readiness — from the Apple Watch you already wear.

Correlate turns your Apple Health data into the daily readiness, recovery, and strain scores you'd expect from a dedicated fitness band or smart ring — with no extra hardware to buy, no monthly subscription, and nothing ever leaving your iPhone.

If you've wanted a recovery wearable but not the price tag or the never-ending membership fees, your Apple Watch already captures what you need. Correlate does the rest.

◈ YOUR DAILY READINESS A single glance tells you whether to push hard today or back off and recover. • Recovery, Strain & Sleep rings • Health Score — one number for how your body is trending • Body Battery, Stress Load, Daylight & Biological Age

◈ SLEEP, DECODED • REM, Deep & Core stages • Sleep debt and how last night compares to your ideal

◈ FIND WHAT ACTUALLY MOVES YOUR HEALTH Does late caffeine wreck your sleep? Does a hard run lift tomorrow's HRV? • Auto-Discovery scans your data for real correlations (Pearson r) • Dual-axis charts plus pro-grade stats: median, standard deviation, variability, trends and outliers

◈ YOUR ON-DEVICE COACH • A daily briefing, plain-English Q&A, and personalized insights — generated entirely on your iPhone

◈ NO SUBSCRIPTION. NO NEW WEARABLE. TOTAL PRIVACY. • One-time purchase — no monthly fees, ever • Works with the Apple Watch and iPhone you already own • 100% on-device — no accounts, no cloud uploads, no tracking. Your health data never leaves your phone.

Stop renting your health insights. Own them.

Requires an iPhone with Apple Health data. An Apple Watch is recommended for recovery, strain, heart-rate and sleep metrics.