# Correlation Lab: Health Test — Find what moves your health

> Find what moves your health (iPhone/iPad app by Radoslaw Jozefowicz.)

- Source: https://appshunter.io/ios/app/correlation-lab-health-test/id6777799025 (this page in markdown: same URL + `.md`)
- Developer: [Radoslaw Jozefowicz](https://appshunter.io/developer/1859278240)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 53 MB
- Languages: American English
- Released: 2026-06-15
- Data updated: 2026-08-14
- User reviews in markdown: https://appshunter.io/ios/app/correlation-lab-health-test/id6777799025/reviews.md

## What is Correlation Lab?

Stop guessing what helps. Start testing it.

Correlation Lab turns your Apple Health data into small, focused experiments — one clear question at a time. Pick two things you're curious about (caffeine and sleep, steps and focus, meetings and readiness) and the Lab quietly tracks how they move together. No dashboards trying to show you everything at once — just a clear verdict, in plain English.

WHY CORRELATION LAB
Most health apps drown you in numbers. Correlation Lab asks one question well: "When X changes, does Y follow?" That's the kind of insight that actually changes what you do tomorrow morning.

HOW IT WORKS
• Pick two metrics — sleep, steps, resting heart rate, HRV, focus minutes, caffeine, readiness, meetings, and more
• The Lab pulls what it needs from Apple Health, or you log it yourself in seconds
• After about two weeks, you get an honest answer — stronger, weaker, or no real link — with a confidence level instead of false certainty
• Every result comes with a "how this was calculated" breakdown and a correlation-isn't-causation reminder, always

START FRESH, OR LOOK BACK
Already have years of Health history? Use it for an instant first read. Making a change starting today — cutting afternoon coffee, adding an evening walk? Start a fresh, forward-looking experiment that only counts the days you actually live through, so you watch the relationship build in real time.

PRIVATE BY DESIGN
Your health data stays on your device. Summaries are written using on-device Apple Intelligence — nothing about your health is ever uploaded. Want deeper analysis? Optionally connect your own AI provider. Entirely your choice, entirely under your control.

BUILT-IN TRUST
• See exactly which days were included, excluded, or missing — and why
• Spot likely confounders before you draw conclusions
• Watch how a relationship shifts over time as you make changes
• Export every experiment whenever you like — your data is always yours

WHAT YOU CAN TEST
Sleep vs. steps. Caffeine vs. sleep quality. Meetings vs. readiness. Hydration vs. energy. Protein vs. recovery. Blood pressure vs. rest. Body weight vs. activity. Or build any pairing you're curious about.

CORRELATION LAB PRO
Unlock unlimited experiments, every advanced Health metric (blood pressure, sleep phases, body composition and more), AI-written explanations, full lab history, and the ability to run several experiments side by side.

Not a medical device. Correlation Lab surfaces patterns in your own data — it isn't medical advice or a diagnosis. Always talk to a healthcare professional about your health.

Test one relationship in your life. See what you find.

Privacy Policy: https://correlationlab.jozefowicz.dev/privacy
Terms of Use: https://correlationlab.jozefowicz.dev/terms

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Weekly pro | $1.99 | per 7 days |
| Monthly pro | $3.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $4.99 | one-time |



## Version history (last 2 releases)

### 1.1.0 — 2026-07-02

Spearman rank correlation — auto-selected for ordinal metrics
Lag correlation — X today → Y tomorrow
Weekday vs weekend split — Mon–Fri / Sat–Sun breakdown with "Diverges" flag (Pro)
Outlier winsorization — 5th/95th percentile cap (Pro)
Compare experiments — side-by-side r, direction, confidence, days (Pro)
Custom names, goal tags, backfill — P0 polish
Branded share card — PNG share image
Feedback form — in-app feature requests

### 1.0.0 — 2026-06-15

No release notes.

## Apps similar to Correlation Lab

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [ONU: AI Health & Prevention](https://appshunter.io/ios/app/onu-ai-health-and-prevention/id6757719164) | 5.0 (2) | Free | Health & Fitness |
| [Fitness Stats](https://appshunter.io/ios/app/fitness-stats/id1511179040) | 4.8 (2,498) | $7.99 | Health & Fitness |
| [wHealth Dashboard](https://appshunter.io/ios/app/whealth-dashboard/id1109404544) | 4.6 (73) | $7.99 | Health & Fitness |
| [Correlation Finder](https://appshunter.io/ios/app/correlation-finder/id6497331166) | 2.0 (2) | Free | Health & Fitness |
| [Brainlab Gym Members Club](https://appshunter.io/ios/app/brainlab-gym-members-club/id1576589988) | — | Free | Health & Fitness |
| [AlcoGrip](https://appshunter.io/ios/app/alcogrip/id1608799940) | 4.5 (58) | $2.99 | Health & Fitness |

## More apps by Radoslaw Jozefowicz

- [DebateAI.app](https://appshunter.io/ios/app/debateaiapp/id6756220308)
- [CacaoFlow: Cacao Ceremony](https://appshunter.io/ios/app/cacaoflow-cacao-ceremony/id6757521229)
- [Metrya – Health AI](https://appshunter.io/ios/app/metrya-health-ai/id6760779874)
- [Energy Gauge: HRV Recovery](https://appshunter.io/ios/app/energy-gauge-hrv-recovery/id6761138778)
- [JOMO Blocks: App Blocker](https://appshunter.io/ios/app/jomo-blocks-app-blocker/id6761625900)
- [HealthData Prompt: AI Insights](https://appshunter.io/ios/app/healthdata-prompt-ai-insights/id6761769616)

All apps by Radoslaw Jozefowicz: https://appshunter.io/developer/1859278240

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*