# n=1 — Longevity Tracker — Biohacker self-experiments

> Biohacker self-experiments (iPhone/iPad app by Gennadii Tsypenko.)

- Source: https://appshunter.io/ios/app/n1-longevity-tracker/id6762523189 (this page in markdown: same URL + `.md`)
- Developer: [Gennadii Tsypenko](https://appshunter.io/developer/1812286268)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Age rating: 12+
- Requires: iOS 18.0 · 2 MB
- Languages: American English
- Released: 2026-04-28
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/n1-longevity-tracker/id6762523189/reviews.md

## What is n=1?

Stop eyeballing trends in Apple Health.

HONEST ABOUT RIGOR
n=1 is for self-experimentation — unblinded, uncontrolled, sample size of one. Results screens say so in plain language. The point isn't proof; it's a structured way to see whether the thing you're trying actually moves your numbers.

THE CORE LOOP
• Pick a curated protocol or design your own (intervention + duration + tracked metrics)
• Log adherence and optional energy / sleep quality / mood scores in a 15-second daily check-in
• HealthKit data is fetched on demand: sleep, HRV, resting heart rate, weight, VO2 max, glucose, body temperature, workouts
• When the protocol ends, see a baseline-vs-protocol chart per metric with the % change called out

PROTOCOL LIBRARY
12 curated experiments across sleep, circadian, cardiovascular, recovery, and lifestyle — creatine, magnesium glycinate, Zone 2 cardio, morning sunlight, and more. Every protocol ships with a falsifiable hypothesis, an honest evidence summary, explicit cautions, and a difficulty rating. No fabricated effect sizes.

SHARE A RESULT
When a protocol ends, share a clean image card with the headline metric, supporting numbers, and a link back to the app — for your group chat, journal, or wherever you log your experiments.

PRIVATE BY DEFAULT
n=1 works fully offline. Your HealthKit data stays on your device — no ads, no analytics, no third-party tracking, no account required to start.

n=1 is a self-experimentation tool, not medical advice. Always consult a qualified healthcare provider before starting any new health protocol.


## Version history (last 2 releases)

### 1.0.1 — 2026-05-01

bug fixes

### 1.0 — 2026-04-28

No release notes.

## More apps by Gennadii Tsypenko

- [SayClear](https://appshunter.io/ios/app/sayclear/id6745448382)

All apps by Gennadii Tsypenko: https://appshunter.io/developer/1812286268

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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 2026-05-17.*