Privacy-first iOS journaling app that treats your life as a personal dataset. Track habits, discover which behaviors correlate with your outcomes. 5.0 stars on the App Store.

Correlate is a privacy-first iOS journaling and habit-tracking app. The core idea: journal your daily behaviors, then discover which habits statistically correlate with your successes.

Features:

Free to download with optional subscription ($1.99/month, $3.99/quarter, $7.99/year).

  • One-tap journal entries with customizable trackers for nutrition, water, weight, exercise, conversations, goals, and memories
  • All data stored entirely on-device — no cloud sync, no account required
  • Searchable journal with date-based navigation
  • Goal setting and habit monitoring over time
  • Data export for personal analysis
  • Universal app for iPhone, iPad, and Mac (Apple Silicon)
Correlate - Health Insights - Free WHOOP alternative using your Apple Watch data | Product Hunt