# Trialist — Health Experiments — Find out what actually works

> Find out what actually works (iPhone/iPad app by RIKU ROBERT BRANDT.)

- Source: https://appshunter.io/ios/app/trialist-health-experiments/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 · 18 MB
- Languages: American English
- Released: 2025-11-11
- Data updated: 2026-08-14
- User reviews in markdown: https://appshunter.io/ios/app/trialist-health-experiments/id6754047046/reviews.md

## What is Trialist?

Stop guessing whether that supplement, bedtime, or new habit is doing anything. Trialist turns
your iPhone into a personal lab: 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
Trialist is free to start — create experiments, log every day, and see how your "did it" days
compare to your baseline. Trialist Pro unlocks the full insight engine: "what moves your data",
dose-response ("how much is enough?"), timing effects ("does it matter when?"), change-point
detection, head-to-head experiment comparison, food-to-symptom lag, and the good-days analysis.
A few free insights each day, so you can try before you commit.

—
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.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## 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 4 releases)

### 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.

### 1.0 — 2025-11-11

No release notes.

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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 2026-08-14.*