Think More Clearly.
Decide More Wisely.
50+ mental models, personalized to your goals. Build sharper thinking one lesson at a time with streaks, spaced repetition, and a learning path made just for you.
Free to download · iOS & Android
Everything you need to think better.
Built around how humans actually learn — not how we think we do.
Personalized Learning Path
Tell us your goal. We sequence 50+ mental models in the order that matters most for you — no two paths are the same.
50+ Mental Models
From First Principles to Loss Aversion — a curated library of the world's most powerful thinking tools.
Streaks & Progress
Daily streaks keep you consistent. Track your current streak, your best, and watch your mastery grow over time.
Spaced Repetition
Models you've seen surface again at exactly the right interval, so the ideas actually stick long-term.
Up and running in minutes.
No complex setup. Just pick your goal and start learning.
Set Your Goal
Choose what matters most: Better Decisions, Think Clearly, Solve Problems, Build Habits, and more.
Learn a Model
One mental model per session. Read the concept, absorb it, and see real-world use cases that make it click.
Apply & Repeat
Spaced repetition surfaces models again at the right time to cement them into how you actually think.
50+ models. One sharper mind.
A sample of what you'll learn — from the most practical frameworks ever discovered.
First Principles
Break any problem down to its fundamental truths.
Inversion
Ask what guarantees failure — then avoid those things.
Pareto Principle
80% of outcomes come from 20% of causes.
Sunk Cost Fallacy
Past costs are gone — only future value matters.
Dunning-Kruger Effect
The less you know, the less you know what you don't know.
Occam's Razor
Among competing explanations, prefer the simplest.
+ 44 more inside the app →
Your best thinking starts here.
Free to download. No credit card required.