How many digits
of π can you remember?
Pi — The Game turns memorizing pi into a beautiful, addictive challenge. Learn the digits ten at a time, beat your streak, and join a global community of pi lovers.
Free. No signup. Works on phone, tablet and desktop.
Why players love Pi — The Game
A decade of polish in one calm little app. Used by students, teachers, math olympians and Pi Day champions around the world.
Learn 10 digits at a time
Pi — The Game teaches the digits of pi in small, rewarding chunks. No overwhelm, just steady progress and satisfying checkpoints.
Beautiful & distraction-free
A calm typographic design that lets you focus on the digits. Dark theme, haptic feedback on iPhone. No ads, ever.
Track your streak
See how far you can go without a single mistake. Beat your personal best and climb a global leaderboard of pi memorizers.
Perfect for Pi Day
Celebrate 3/14 by memorizing 100 digits. Classroom-friendly and great for pi recitation challenges and trivia.
Free to play
The web version is free forever. The iPhone app is a one-time purchase that unlocks trophies, checkpoints and themes.
Works everywhere
Browser, iPhone, iPad. Progress is stored locally — no account required. Play offline once the page has loaded.
The whole universe of π, in one place.
Everything pi-curious humans come looking for: calculators, a million digits, fun facts, Pi Day printables, piems, and a real game to play. All free. All designed for clarity.
What is pi, really?
Pi (π) is the ratio of a circle's circumference to its diameter. It's the same for every circle in the universe — from a soup can to a galaxy — and its decimal expansion goes on forever without ever repeating. That's what makes it endlessly fascinating, and endlessly memorizable.
The first ten digits of pi are 3.141592653. The current world record holder has recited over 70,000. Pi — The Game is how most people start the climb.
Ready to learn a few more digits?
Play right here in your browser, or take it with you on iPhone. Either way, there's no sign-up and nothing to lose — except the digits you'll never forget.