Features

Variable Tracking

Define the variables you want to track. Each variable has a name, an optional note, and a type:

• Boolean — A simple on/off toggle. Great for habits, symptoms, or yes/no questions.
• Float — A numeric slider with configurable min, max, and default values. Use it for ratings, measurements, or quantities.

Daily Recording

Each day starts fresh with variables reset to their defaults. Update them at any point during the day — your data is saved immediately as you make changes.

Daily Notes

Add a free-form text note to any day. Capture context that doesn't fit neatly into a variable — what you ate, how you felt, what happened.

Day Navigation

Today is front and center when you open the app, but you can swipe or tap to navigate to any previous day and update its values.

Data Visualization

Plot your tracked variables over time to spot trends and correlations.

Sync

Synchronize your data across devices using your own WebDAV server. Your data stays under your control.

Fast by Design

Correlate is built to open instantly. Record an event and get back to what you were doing — the app is ready before your thumb reaches the screen.