# NumMemorize — Memorize π, ℇ, √2 & more! > Memorize digits of mathematical constants and custom numbers with quizzes and voice input. (iPhone/iPad app by Mahboud Zabetian.) - Source: https://appshunter.io/ios/app/nummemorize/id310151986 (this page in markdown: same URL + `.md`) - Developer: [Mahboud Zabetian](https://appshunter.io/developer/310151989) - Category: Education, Games - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 9.0 · 3 MB - Languages: American English - Released: 2009-04-03 - Data updated: 2026-06-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/nummemorize/id310151986/reviews.md ## What is NumMemorize? NumMemorize quizzes you on the digits of well-known constants (such as π, e, √2), and will help you memorize additional digits. This app is a must-have for math and science students, and those wishing to impress teachers, friends and family, or fellow nerds! What party won't be livened up with a 20 digit recall of ϕ (the Golden ratio)? Imagine walking up to the blackboard and writing out √2 to 30, 40, or more digits! Say you're being hustled at a game of pool. Easy, bet your opponent, double or nothing, that you can recount pi to 30, no, even better, 50 digits. Let those other kids fill their heads with useless sports stats. These numbers are timeless and universal! Who knows who you'll impress - armed with this knowledge, you'll probably marry a smarter and better looking spouse, have a better job and live happily ever after! NEW! Now enter your own numbers! You can enter any numbers you'd like: drivers license, card numbers, phone numbers and your own favorite constants and values. Go ahead, enter 99! NEW! You can now just speak your number instead of tapping it in! NumMemorize makes it easy to memorize any number! (99! is 933262154439441526816992388562667004907159682643816214685929638952175999932299156089414639761565182862536979208272237582511852109168640000000000000000000000) ## Key features - Memorize digits of pi, e, and other constants - Quiz yourself on number recall - Input and memorize custom numbers - Voice input for number entry - Practice for math and science students ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/nummemorize/id310151986/reviews.md ### 5/5 — Such a great app! So worth it! *2017-11-26, version 3.0* Thank you for putting this on the app store. This is the best irrational number memorization app ever! So many fun constants, I've memorized them all now with this app! Thank you :) ### 5/5 — Stupidly cool. *2009-04-19, version 0* My kids and I have been competing to learn the most digits of PI. This gives me the edge. (My kids think I'm cheating!) Love the app. ## Frequently asked questions about NumMemorize ### What constants can NumMemorize help me memorize? NumMemorize helps you memorize the digits of well-known mathematical constants such as π (pi), ℇ (e), and √2 (square root of 2). You can also input and memorize your own custom numbers. ### Does NumMemorize have ads? NumMemorize is ad-free, allowing for an uninterrupted learning experience. You can focus on memorizing numbers without any advertisements. ### What devices does NumMemorize support? NumMemorize is available on iPhone, iPad, and iPod. It is designed to work across various Apple mobile devices. ### How does NumMemorize track my progress? The app provides quizzes to test your recall of number sequences. While specific progress tracking features are not detailed, the quiz format allows you to gauge your improvement over time. ### Can I enter my own numbers into NumMemorize? Yes, NumMemorize allows you to enter your own custom numbers, such as driver's license numbers, card numbers, or phone numbers. This feature expands its utility beyond mathematical constants. ### What is the age rating for NumMemorize? NumMemorize has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content. ### How often is NumMemorize updated? The latest version of NumMemorize is 3.0.1, which was last updated on February 17, 2018. While updates have not been frequent recently, the app remains functional for its core purpose. ### What is the user sentiment for NumMemorize based on ratings? NumMemorize has received a perfect rating of 5.0 stars from 1 rating. This indicates a highly positive initial user experience. ## Version history (last 5 releases) ### 3.0.1 — 2018-02-17 This app has been updated by Apple to display the Apple Watch app icon. iPhone X support. ### 3.0 — 2017-08-14 You can now just SAY your number! ### 2.0 — 2017-07-18 A revamped UI. Support for hardware keyboards and number pads. You can now enter any of your own numbers you'd like: card numbers, phone numbers and your own favorite constants and values. Go ahead, enter 99! (99! is 933262154439441526816992388562667004907159682643816214685929638952175999932299156089414639761565182862536979208272237582511852109168640000000000000000000000) ### 1.1 — 2009-04-16 Better handling of digits as 50 - 100 digits are entered. Small UI enhancements ### 1.0 — 2009-04-03 No release notes. ## Apps similar to NumMemorize | App | Rating | Price | Category | | --- | --- | --- | --- | | [Calculation of Pi](https://appshunter.io/ios/app/calculation-of-pi/id1290677995) | — | $0.99 | Education | | [Learn Erlang Programming](https://appshunter.io/ios/app/learn-erlang-programming/id1634383128) | 4.5 (2) | $0.99 | Education | | [Phylogenetic Tree Draw](https://appshunter.io/ios/app/phylogenetic-tree-draw/id6443900345) | — | $4.99 | Education | | [Memopize](https://appshunter.io/ios/app/memopize/id1546127197) | 5.0 (6) | Free | Education | | [GeoGuru: Master Country Flags](https://appshunter.io/ios/app/geoguru-master-country-flags/id6738300459) | 5.0 (1) | Free | Education | | [gcc-Lab](https://appshunter.io/ios/app/gcc-lab/id6475364774) | 4.0 (1) | Free | Education | ## More apps by Mahboud Zabetian - [Lumin](https://appshunter.io/ios/app/lumin/id480343142) All apps by Mahboud Zabetian: https://appshunter.io/developer/310151989 ## Related topics [nummemorize](https://appshunter.io/ios/topics/nummemorize) · [mahboud zabetian](https://appshunter.io/ios/topics/mahboud-zabetian) --- *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 2026-06-04.*