N of 1: Self-Experiments
Your lab for self-improvement
About
This app allows you to conduct personal scientific trials to understand how interventions affect your individual body. It guides you through control and treatment phases, presenting clear results in plain English.
What's New in N of 1
1.2(3)
September 29, 2026
Thanks for using N of 1! This update includes: - A new "Ten-Minute Morning Walk for Energy" trial — the easiest way to get started, nothing to buy - A quick intro on the sign-in screen explaining what the app does - The demographics form is now optional - Added Terms of Service and Privacy Policy, with a one-time consent screen for new sign-ins - Reminders no longer nag you after you've already checked in for the day - Evening check-ins now open at 6 PM instead of first thing in the morning, so you're reporting on your whole day - Fixed a timing bug in sleep trial reminders - Your trial calendar now clearly shows any day you missed, and you can tap it to fill it in - If you miss a day or two, you can still finish your trial instead of getting stuck — you'll get one chance to fill in what you remember before your results are calculated - Fixed a layout issue where the bottom of some screens felt cut off - Various small bug fixes and polish
MoreFAQ
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.
