# Sleep Habits Lab — Trialist

> Biohacking & Self-Experiments

Canonical page: [https://chrome-stats.com/d/id6754047046](https://chrome-stats.com/d/id6754047046)

## Overview

- **ID:** `id6754047046`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** RIKU ROBERT BRANDT
- **Category:** Health & Fitness
- **Version:** 1.5
- **Last updated:** 2026-09-12
- **First published:** 2025-11-11
- **Size:** 25 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/sleep-habits-lab-trialist/id6754047046)
- **Website:** [https://gettrialist.app/](https://gettrialist.app/)
- **Privacy policy:** [https://gettrialist.app/privacy](https://gettrialist.app/privacy)

## Description

Does magnesium help you sleep? Does late coffee hurt? Test any habit against the sleep, HRV and heart data your iPhone already has. Private, on-device, no account.

Do your sleep habits actually work? Magnesium before bed, no coffee after 3pm, an earlier last meal, a cold plunge: Trialist tests each one against the sleep, HRV and heart data your iPhone already records, and tells you whether it made a difference. Change one thing, and watch what actually happens in your own health data.

HOW IT WORKS
1. Pick something to test — magnesium before bed, an earlier last meal, cold plunges, no late caffeine, a new routine. Anything you can do (or skip) on a given day.
2. Log it in a tap. Trialist reads your Apple Health data in the background.
3. See the difference. Trialist compares your "did it" days against your personal baseline and shows you the change — with the sample size and strength behind every number.

WHAT MOVES YOUR DATA
The heart of Trialist is one honest question: what actually moves your sleep, HRV, resting heart rate, steps, or energy? Trialist ranks your habits, doses, and journal tags by their real day-to-day effect — not by hype. Dig into dose-response ("how much is enough?"), timing effects ("does it matter when?"), and change-points ("when did things shift?").

RATE YOUR DAY
Give the day a quick 1–10. Over time Trialist learns what separates your great days from your rough ones — and even which way the arrow points (does better sleep make a better day, or the other way around?).

A JOURNAL THAT EXPLAINS THE OUTLIERS
Capture what you ate, how you felt, or a gut symptom in a tap, and tag the day (sick, traveling, big meal, hard workout). Trialist lines those entries up against your metrics — so you can catch the food behind a rough night, or the symptom that shows up a day after a trigger.

BUILT ON HONESTY
Most health apps overclaim. Trialist does the opposite. Every result shows how much data is behind it (Limited / Good / Strong), calls associations what they are — associations, not proof — and lets you exclude sick or travel days so they don't skew your results.

PRIVATE BY DESIGN
- No account. No sign-up.
- No cloud. Everything stays on your device.
- No third-party tracking or ads.
- Export your full data anytime as JSON, or a clean PDF to share with whoever you choose.

TRACK EVERYTHING IN ONE PLACE
- Binary habits, A/B comparisons (Running vs Cycling), dosed supplements, and timed routines.
- A visual calendar of every trial, streaks, and adherence.
- A day journal with tags to capture context (sick, traveling, big meal, hard workout…).

TRIALIST PRO
Free gets you the whole loop: your first experiment, one-tap logging, its verdict, and the first thing your Apple Health history already says about you. Pro is for when one question isn't enough:
- Run your next experiment, and as many at once as you like
- Every finding from your history — and turn any of them into a zero-logging experiment
- What lifts or drags your day rating
- Dose and timing: how much is enough, and does it matter when
- One-page trial reports to share with a doctor or coach

SUBSCRIPTION DETAILS
Trialist Pro is available as a monthly or yearly auto-renewing subscription, or as a one-time lifetime purchase. Prices are shown in the app before you buy. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period; manage or cancel it anytime in your Apple Account settings.
Privacy Policy: https://gettrialist.app/privacy
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

—
Trialist is for personal, informational, and educational use only. It is not a medical device and does not diagnose, treat, cure, or prevent any disease or condition. Always consult a qualified health professional before changing your health routine.

## Rankings

- #1,299,270 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6754047046)