# N of 1 App — Your lab for self-improvement > Personalized self-experimentation app for individual health and habit trials. (iPhone/iPad app by Paul Fenyves.) - Source: https://appshunter.io/ios/app/n-of-1-app/id6770629089 (this page in markdown: same URL + `.md`) - Developer: [Paul Fenyves](https://appshunter.io/developer/1896758424) - Category: Health & Fitness - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 17+ - Requires: iOS 15.0 · 15 MB - Languages: American English - Released: 2026-06-09 - Data updated: 2026-07-28 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/n-of-1-app/id6770629089/reviews.md ## What is N of 1 App? Does magnesium actually improve your sleep? Does a new habit really make a difference? Everyone's body is different — and population averages from clinical studies don't predict your individual response. N = 1 is a self-experimentation app that lets you run your own rigorous personal trials, using the same two-phase framework as professional clinical research. How it works Each trial has two phases: • Control Phase — You track your baseline without any intervention, so you know where you're starting from. • Treatment Phase — You add the intervention and keep tracking the same metrics. At the end, N = 1 compares your two phases side by side and tells you, in plain English, what actually changed in your own data. The science, without the lab coat Daily check-ins take under 60 seconds. Results are shown as clear charts with a plain-English summary — no jargon, no exaggerated claims. Just your numbers. First trial: Magnesium Glycinate for Sleep A 21-day structured experiment. One week of baseline sleep tracking, followed by two weeks of taking magnesium glycinate before bed. You'll measure: • Hours slept • Time to fall asleep • Number of awakenings • Time spent awake • Overall sleep quality When your trial ends, you get a full results breakdown — averages, charts, and a verdict on what your data showed. Morning reminders keep your streak going. Evening reminders prompt you to take your supplement. Your data stays private. More trials coming soon. ## Key features - Run personal scientific trials - Two-phase framework (control & treatment) - Track baseline metrics - Analyze intervention impact - Plain-English results - Daily check-ins under 60 seconds ## Frequently asked questions about N of 1 App ### What is N of 1 App? N of 1 App is a self-experimentation tool that helps you run personal trials to understand how specific interventions affect your body. It uses a scientific framework to compare your baseline data with data collected during an intervention phase. ### How does N of 1 App work? The app guides you through two phases: a control phase to track your baseline and a treatment phase where you introduce an intervention. It then compares the data from both phases to show you what changed. ### What kind of experiments can I run with N of 1 App? You can experiment with various interventions, such as the impact of magnesium on sleep, or the effectiveness of a new habit. The app provides an example experiment for magnesium glycinate and sleep. ### How long do daily check-ins take with N of 1 App? Daily check-ins with N of 1 App take under 60 seconds, making it easy to consistently track your progress and data. ### Are the results from N of 1 App easy to understand? Yes, results are presented as clear charts with a plain-English summary, avoiding jargon and exaggerated claims. The focus is on presenting your personal numbers. ### What devices does N of 1 App support? N of 1 App is available on iPhone, iPad, and iPod, indicating broad Apple device compatibility. ### Is N of 1 App suitable for younger users? N of 1 App has an age rating of 17+, suggesting it is intended for adult users due to the nature of self-experimentation and data analysis. ### Does N of 1 App have ads? No, N of 1 App does not contain advertisements, providing an uninterrupted user experience. ## Version history (last 2 releases) ### 1.1 — 2026-06-12 Updated App Name. Fixed handling of iPhone push notifications ### 1.0 — 2026-06-09 No release notes. --- *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 2026-07-28.*