Pick a question to test
Start from a ready-made template — dozens covering things like sleep, diet, mood, work habits, and more — or write your own. Each study is a short set of daily questions, each one either a cause ("Did I have caffeine after 2pm?") or a result ("How well did I sleep?").
Log a quick answer, most days
A simple yes/no or a short scale (like 0–5) for each question. It only takes a minute, and missing an occasional day is fine — we work with whatever data you actually have, not a fixed schedule. Reminders land by email, so there's nothing to install or log into.
We then find the pattern
Once there's enough data, we automatically run the statistics in the background. We check not just same-day effects but delayed ones too — does yesterday's habit affect today's result? Then we surface a plain-language summary: strong link, moderate link, or no clear link yet. More details on finding patterns →
⚙ Under the hood
What's happening behind the scenes
You never touch a formula or build a chart yourself. Every time you log an answer, we:
- Re-check correlation strength (effect size) between your cause and result
- Test a range of delays, not just same-day, in case the effect shows up a day or a few days later
- Adjust for the fact that it's testing multiple things at once, so a "link" actually means something
- Tell you how strong a pattern is, and how statistically significant it is, if one shows up
It's more rigorous than what you'd likely get from a spreadsheet — with no work on your part.