Correlate app iconCorrelate

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, no monthly subscription, and nothing ever leaving your iPhone.

$4.99one-time
no subscription
Download on the App Store
Correlate app showing Today view with Recovery 75, Sleep 93%, Strain 4.2, and HRV 44

Your daily readiness

A single glance tells you whether to push hard today or back off and recover.

75
Recovery
93%
Sleep
4.2
Strain
44ms
HRV

Discover what moves your health

Auto-Discovery scans your data for real correlations (Pearson r). Clearly labeled: correlation, not causation.

100% on-device

Total privacy

No accounts. No cloud uploads. No tracking. Your health data never leaves your phone.

Data Not CollectedNo subscriptionsNo monthly fees
the5krunner

Indie Spotlight on Correlate's on-device Pearson r auto-discovery, delayed-effect correlations, and $4.99 one-time purchase.

Stop renting your health insights

Own them.

Download on the App Store

$4.99 one-time purchase