# Sleep Habits Lab — Trialist — Biohacking & Self-Experiments

> Biohacking & Self-Experiments (iPhone/iPad app by RIKU ROBERT BRANDT.)

- Source: https://appshunter.io/ios/app/sleep-habits-lab-trialist/id6754047046 (this page in markdown: same URL + `.md`)
- Developer: [RIKU ROBERT BRANDT](https://appshunter.io/developer/1846430592)
- Category: Health & Fitness, Productivity
- Price: Free with in-app purchases (on sale, was $3.99)
- Age rating: 12+
- Requires: iOS 17.0 · 25 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Polish, Brazilian Portuguese, Russian and 5 more
- Released: 2025-11-11
- Data updated: 2026-09-21
- User reviews in markdown: https://appshunter.io/ios/app/sleep-habits-lab-trialist/id6754047046/reviews.md

## What is Sleep Habits Lab?

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.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Trialist Pro — Annual | $19.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Trialist Pro — Lifetime | $49.99 | one-time |



## Version history (last 5 releases)

### 1.5 — 2026-09-12

Trialist is now Sleep Habits Lab: same app, a clearer name for what it does.

- A calmer, redesigned look across Dashboard, Experiments, Insights and Journal
- Three starter experiments to pick from: magnesium, caffeine cutoff, no alcohol
- Verdicts wait for enough days before they commit, compare against your pre-experiment baseline, and respect your excluded days everywhere
- Rate your day and see next-day symptom effects
- Honest empty states: no findings before there is data

### 1.4 — 2026-08-25

Trialist now speaks 14 languages: German, French, Spanish, Italian, Portuguese, Japanese, Korean, Chinese (Simplified and Traditional), Dutch, Swedish, Polish, Russian, and Turkish.

Also in this update:
- Track symptoms as experiment outcomes - test what helps your gut, headaches, or energy
- Log foods and symptoms as variables in the journal
- Redesigned onboarding: pick a goal and start with a running experiment
- Verdicts now always agree with the numbers next to them
- Calendar fixes and faster analysis

### 1.3 — 2026-07-27

A big update focused on understanding what actually works for you:

• What moves your data — a new ranked view of the habits, doses, and days that shift your sleep,
  HRV, energy and more, by real effect size.
• Rate your day — a one-tap daily score, plus an analysis of what separates your good days from
  your rough ones (and which comes first).
• Journal — capture meals, symptoms and context in a tap, then see how they line up with your
  metrics (like a food that shows up in your gut a day later).
• A smoother start — pick a goal and Trialist sets up your first experiment for you.
• Sharper, more honest stats — clearer confidence levels, change-point detection, and the option
  to exclude sick or travel days.

Thanks for experimenting with us. Questions or ideas? We read every message.

### 1.2 — 2026-01-19

Bug fixes and Improvements

### 1.1 — 2025-11-23

Performance improvemets and bug fixes.

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## More apps by RIKU ROBERT BRANDT

- [Hank: Workout Tracker & Log](https://appshunter.io/ios/app/hank-workout-tracker-and-log/id6801644855)

All apps by RIKU ROBERT BRANDT: https://appshunter.io/developer/1846430592

## Related topics

[habitslab](https://appshunter.io/ios/topics/habitslab)

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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 2026-09-21.*