Datalyst: N-of-1 Tracker
Habits, experiments & insights
Free · Designed for iPad. Not verified for macOS.
Run single-subject experiments on yourself. Track what you change, measure what happens, and find out whether it actually worked.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Refreshed app icon and small fixes.
The developer, Gustavo cesar Sola Barreto Marcelino, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Gustavo cesar Sola Barreto Marcelino
- Size
- 1.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Datalyst. All rights reserved.