# Datalyst — N-of-1 data tracker

> N-of-1 data tracker (iPhone/iPad app by Gustavo cesar Sola Barreto Marcelino.)

- Source: https://appshunter.io/ios/app/datalyst/id6773505371 (this page in markdown: same URL + `.md`)
- Developer: [Gustavo cesar Sola Barreto Marcelino](https://appshunter.io/developer/1875104005)
- Category: Health & Fitness, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 2 MB
- Languages: English
- Released: 2026-08-25
- Data updated: 2026-09-17
- User reviews in markdown: https://appshunter.io/ios/app/datalyst/id6773505371/reviews.md

## What is Datalyst?

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.


## Version history (last 2 releases)

### 1.0.4 — 2026-09-15

Refreshed app icon and small fixes.

### 1.0.3 — 2026-08-26

No release notes.

## More apps by Gustavo cesar Sola Barreto Marcelino

- [DE.med](https://appshunter.io/ios/app/demed/id6758807897)
- [Aleph: Hebrew & Greek Bible](https://appshunter.io/ios/app/aleph-hebrew-and-greek-bible/id6758858816)
- [Advanced Dual N-Back](https://appshunter.io/ios/app/advanced-dual-n-back/id6758858941)
- [AU.med](https://appshunter.io/ios/app/aumed/id6760537209)
- [FR.med](https://appshunter.io/ios/app/frmed/id6760537230)
- [IT.med](https://appshunter.io/ios/app/itmed/id6760537314)

All apps by Gustavo cesar Sola Barreto Marcelino: https://appshunter.io/developer/1875104005

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-17.*