# Pi Brain > Memorize and test recall of pi digits with scoring and friend challenges. (iPhone/iPad app by Henry Chan.) - Source: https://appshunter.io/ios/app/pi-brain/id311957474 (this page in markdown: same URL + `.md`) - Developer: [Henry Chan](https://appshunter.io/developer/311957477) - Category: Education, Games, Trivia - Price: Free - Rating: 3.70/5 from 9 App Store ratings · 77 written reviews indexed - Age rating: 4+ - Requires: iOS 6.0 · 3 MB - Languages: American English, French (France), Italian, European Spanish - Released: 2009-04-21 - Data updated: 2026-06-09 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/pi-brain/id311957474/reviews.md ## What is Pi Brain? How many digits of pi can you remember? Since pi is an irrational number, the digits never end or repeat. You will probably never have to use more than a dozen digits in any calculation, so why learn the digits of pi? For some people this is a challenge. The Guinness record for remembered digits is 67,890 digits. With this program you will have the opportunity to test your memory, and learn a universal number. Have contests with your friends and family. This is a great learning tool for all ages. You be surprised how much you can remember with a little practice. The option to save the score will only appear if you do not make more than one mistake and do not use the hint or switch to the learn mode. Scores can be sorted by date, name, or score. Use this list to verify your retention over long periods. ## Key features - Memorize pi digits - Test memory recall - Score saving - Sort scores by date, name, or score - Friend contests - Learning tool ## Recent user reviews (10 of 77) All indexed reviews: https://appshunter.io/ios/app/pi-brain/id311957474/reviews.md ### 5/5 — Very good app *2017-07-12, version 1.5* Very good app! Very user friendly and it's very good to learn the digits. It's the only reason why I was able to learn the first 500 pi digits. ### 5/5 — Neat app works for me *2016-10-08, version 1.5* No glitches and well written. Got me to 100 digits in no time. Like it. ### 4/5 — Good App *2016-03-19, version 1.5* Overall I think this is a good app. One recommendation would be to allow which digit to start or don't count the whole number 3 in the row divisions. Just a suggestion. Keep up the good work!! ### 3/5 — Pi master *2015-11-11, version 1.5* After you past 40 or so, it blocks what row you are on. ### 4/5 — Great game, just one problem *2015-06-22, version 1.5* This game is fun, and it helps me alot with memerizing pi, but when I open my scores, it shows nothing. Am I doing something wrong, or is it the game? Other than that it is fun and i love the set up of the game. ### 5/5 — Learn Pi *2015-05-27, version 1.5* Great app for learning Pi to hundreds of places! ### 5/5 — Best Ive found! *2015-05-26, version 1.5* This app run smoothly and is very user friendly! Get it, you won't regret your decision! ### 1/5 — Bug *2015-04-25, version 1.5* DEVELOPERS: There's a bug where when you get over 100 or so digits it does this weird scrolling thing after every button press. Please fix! ### 4/5 — Simple and fun *2015-01-21, version 1.5* My son and I like playing this game as we learn more digits of pi. I'm up to 230, and he's up to 60. Of course, since he's only three years old, I think he still has me beat. ### 2/5 — Needs more improvement for iOS8 *2015-01-07, version 1.5* Now works in iOS8, but the screen "jumps" when you get past ~100. Also, my score history got deleted when I updated!! I'm disappointed about that. ## Frequently asked questions about Pi Brain ### What does the Pi Brain app do? The Pi Brain app is designed to help users test and improve their ability to memorize the digits of pi. It offers a way to challenge yourself, track your progress, and even compete with friends and family. ### How does the scoring system work? Scores are saved only if you make no more than one mistake and do not use the hint or switch to learn mode during a session. Saved scores can then be sorted by date, name, or the score itself to monitor your retention over time. ### Is this app suitable for all ages? Yes, the app is described as a great learning tool for all ages. It provides a fun and engaging way to practice memory skills and learn about the universal number pi. ### What are the benefits of using Pi Brain? Using Pi Brain can help you test your memory capacity, learn the digits of pi, and potentially improve your retention over long periods with practice. It also allows for friendly competition, making the learning process more enjoyable. ## Version history (last 5 releases) ### 1.5 — 2015-01-03 This app has been updated by Apple to display the Apple Watch app icon. Fixes to work on iOS 8. ### 1.4 — 2011-02-09 Fix keyboard problems in iOS 3.x ### 1.3 — 2010-11-03 Fix scrolling for iOS 4. New format for Scores. ### 1.2 — 2010-06-03 Allow one incorrect key before disable of save. Can continue after save with more digits to save again. Allow delete for single score. Bring up keyboard when saving name. Save Score Name on exit. ### 1.1 — 2009-07-28 Scrolling works correctly on iPhone OS 3.0 & 2.2.1 Add Sound for key press. Display results of last session. Allow saving of scores. Display of scores with sorting by name, score, or date. ## Apps similar to Pi Brain | App | Rating | Price | Category | | --- | --- | --- | --- | | [Omltt](https://appshunter.io/ios/app/omltt/id6480270991) | — | Free | Education | | [Nanzoo Clock](https://appshunter.io/ios/app/nanzoo-clock/id625986965) | — | Free | Education | | [Pi — Infinite Digits](https://appshunter.io/ios/app/pi-infinite-digits/id6760476465) | — | Free | Education | | [ColoredMath](https://appshunter.io/ios/app/coloredmath/id6475593223) | — | Free | Education | | [MathMind: Daily Math Practice](https://appshunter.io/ios/app/mathmind-daily-math-practice/id6746676066) | — | Free | Education | | [The Mighty Minute - Add L1](https://appshunter.io/ios/app/the-mighty-minute-add-l1/id430455147) | — | Free | Education | ## Related topics [pi9 limited](https://appshunter.io/ios/topics/pi9-limited) · [tossable digits](https://appshunter.io/ios/topics/tossable-digits) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*