Correlate - Health Insights

Recovery scores from the Watch you already wear.

2 followers

Recovery scores from the Watch you already wear.

2 followers

Your Apple Watch already captures recovery, strain, and sleep. Correlate turns that into daily scores: no extra ring or strap, no monthly fee, nothing leaving your iPhone. $4.99 once. Import official Oura or WHOOP exports if you already wear them. Auto-Discovery looks for Pearson r, including delayed effects. Correlation, not causation.

Correlate - Health Insights gallery image

Free

Launch tags:Health & Fitness•Apple•Quantified Self

Launch Team / Built With

UXTesting

Hunter

📌

Hey Product Hunt! 👋 I'm David, a solo dev from Taiwan. I built Correlate because I was paying $239/year for WHOOP when my Apple Watch already collects the same raw data. What was missing was the analysis layer. The feature I'm most proud of is Granger Causality Analysis — a real econometrics method that tests whether changes in one metric PREDICT future changes in another. It's the difference between "steps and sleep correlate" and "2,000 more steps today predicts 15 min more deep sleep tomorrow." Another one: Change Point Detection (AMOC algorithm) finds the exact date something shifted. Start a new supplement? It'll show you if your HRV actually changed — with statistical proof. I'd love to hear: - What health connections would you want to discover? - Is the free tier generous enough? Thanks for checking it out!

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6mo ago

UXTesting

Hunter

Wrote up the mental model behind Correlate: Apple Health is a bridge, not a backup of Oura / WHOOP / Garmin.

X Article (with diagrams): https://x.com/davidyctseng/statu...

Guide: https://correlate.davidyc.com/gu...

Happy to answer questions here.

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20d ago