Make a pact, not a resolution
N of 1 is a personal research notebook for tiny life experiments, inspired by the PACT framework from the book Tiny Experiments. Instead of building "habits" and breaking "streaks", you make a simple pact:
"I will [action] for [duration]."
Then you observe what actually happens.
No streaks. No guilt.
Habit apps punish gaps. Scientists just note a data point and move on. N of 1 shows completion rates and observations — never a broken chain, never a red day. Every experiment has a defined end date, so nothing nags forever. And when it concludes, you run a retro — Plus / Minus / Next — and give your verdict:
Every outcome is a result.
What you get
- Guided pact wizard Action, duration, cadence, purpose, hypothesis.
- One-tap check-ins Daily log with optional field notes.
- A neutral calendar Just data — no red days.
- Retro & verdicts Four-way verdict, pivots linked into chains.
- Lab Notebook Every concluded experiment with its key learning.
- Gentle reminders You control them. You can silence them.
Private by design
Everything stays on your device. No account. No cloud. No tracking. Read the privacy policy — it's short.
Free & Pro
Running one experiment at a time is free, forever — including the full retro. Lab Pro unlocks unlimited parallel experiments, your full archive, and Markdown/CSV export. Yearly includes a 7-day free trial.