01THE CHALLENGE
Make the next digit yours.
Enter the digits of pi in order. You have three chances to make a mistake and one hint to reveal the next digit.

3.14159 is just the beginning. Learn the digits of pi, put your memory to the test, and go one digit further.
For iPhone & iPad · English / 日本語

A simple way to turn your curiosity into a personal best.
Enter the digits of pi in order. You have three chances to make a mistake and one hint to reveal the next digit.

Explore one million digits of pi. Search for your birthday or a favorite number, and discover where it appears.

Look back at your attempts, check your best score, and see how far you have come. Hint-assisted attempts are marked in your history.

Screenshots show the Japanese version. The app also supports English.
Start with 3.14. See where your memory takes you.
Download on the App Store