
Datalyst
N-of-1 data tracker
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Free
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About
Datalyst turns daily check-ins into evidence about your own life.
Most tracking apps show you what happened. Datalyst is built to answer a harder question: did the thing you changed actually make a difference?
N-OF-1, ON YOUR PHONE
A single-subject experiment is the cleanest way to test something on yourself. Pick a protocol, run it for a while, keep logging, and look at the result against your own baseline — not against a population average that may say nothing about you.
WHAT YOU CAN TRACK
• Sleep, focus, mood, energy and workouts
• Routines and habits, as often or as rarely as you like
• Any custom variable you define, numeric or scaled
WHAT YOU GET BACK
• Streaks and activity heatmaps, so gaps are obvious at a glance
• The Lab — test correlations between a protocol and an outcome
• Trends over time, rather than a number that resets every morning
• Your history, kept and comparable across months
BUILT FOR HONEST DATA
Logging takes seconds, because a tracker you skip is a tracker that lies. Nothing nags you, nothing gamifies your health, and nothing pretends a correlation is a diagnosis.
PRIVATE BY DEFAULT
Your log is yours. Privacy policy: https://www.datalyst.one/privacy
Datalyst is a self-tracking tool, not a medical device. It does not diagnose, treat, or replace professional medical advice.
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What's New in Datalyst
1.0.4
September 15, 2026
Refreshed app icon and small fixes.


