# My Lisp — A Lisp interpreter > Local Lisp interpreter and development environment for iOS and macOS. (iPhone/iPad app by Laurent Rodier.) - Source: https://appshunter.io/ios/app/my-lisp/id1245341806 (this page in markdown: same URL + `.md`) - Developer: [Laurent Rodier](https://appshunter.io/developer/697920086) - Category: Developer Tools, Education - Price: $3.99 - Rating: 4.10/5 from 17 App Store ratings · 16 written reviews indexed - Age rating: 4+ - Requires: iOS 18.0 · 19 MB - Languages: American English - Released: 2017-11-07 - Data updated: 2026-08-23 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/my-lisp/id1245341806/reviews.md ## What is My Lisp? My Lisp is a complete and universal Lisp environment running directly on the iPhone, iPad, and Mac. This interpreter is true to the original John McCarthy Lisp implementation with the fundamental 7 operators quote, atom, eq, car, cdr, cons, cond, along with lambda and label. My Lisp also contains core and mathematical operators borrowed from other Lisp dialects (Le Lisp, Lisp 1.5, MacLisp, Common Lisp and Scheme to name a few) to make it easy to learn, program, and most importantly, enjoy Lisp. It also features built-in functions for advanced mathematics, including complex numbers and numerical analysis (roots and zeros finder, integral approximation). The complete description of the fundamental, core, and built-in functions is available using a set of library functions completely written in My Lisp. My Lisp offers an interpreter and an editor, all working on the iPhone, iPad, and Mac, and most importantly, without requiring any server connection, that is, the interpreter is executing locally on the iPhone, iPad or Mac My Lisp is installed on. Library and example files contain the source code of classical functions and problems solved by My Lisp and may be used as reference to learn Lisp and develop other programs. They include classical puzzles (hanoi and n-queens), basic mathematical functions (gcd, lcm, factorial, fibonacci, prime?), and the historical apply, mapcar and maplist functions. The Lambda Calculus example file contains various functions related to Lambda Calculus and Combinators, with alpha-conversion, beta-reduction, de Bruijn notations, etc. As a special note, the example file Symbolic Derivation contains a complete yet extensible symbolic derivation module allowing to compute the formal derivation of virtually any symbolic function expressed as a Lisp expression. A user manual and a reference manual are available from within the application but also on My Lisp web site (https://lisp.lsrodier.net) and in Apple Books. The complete source code of the library and example files is part of My Lisp. Last but not least, this overview couldn’t end without a sample definition of the notorious REPL function: (define (REPL eval_me) (REPL (println (eval (read))))) ## Key features - Local Lisp interpreter - Integrated editor - Core and mathematical operators - Advanced mathematics functions - Symbolic derivation module - Library and example files - User and reference manuals ## Chart rankings - #94 in Top Paid · Developer Tools (US App Store) ## Recent user reviews (10 of 16) All indexed reviews: https://appshunter.io/ios/app/my-lisp/id1245341806/reviews.md ### 4/5 — Scrolling needs improvement *2026-02-13* In the Console, when you fill it up the last line is off the bottom so you can’t see the result or what you are typing. Other than that it works great. ### 2/5 — Oh... *2025-09-20* Since I can’t copy and paste from the website, it’s difficult to use it for checking the behavior of sample code. ### 5/5 — Thank you! *2023-11-17* At first glance, a very nice implementation of LISP on the Mac, with which AI programming (Peter Norvig, 1991) can be learned wonderfully ### 5/5 — Very nice iOS implementation *2022-02-17* Nice lisp interpreter I’m on iOS. It’s fast and extensible. Includes a number of examples. Nice editor and other tools included. Can’t beat the price. ### 1/5 — MAJOR FUNCTIONS MISSING *2020-09-10* This app is useless. Most functions from common lisp say ‘undefined function’. There isn’t even an array function. Basic functions such as defun are missing. Is there a way to get them in there, and if so how to define them? We don’t know because the ‘help’ tab is also useless. **Developer response:** The help page provides the list of the functions along with an access to the user manual in PDF format that may answer a few of your questions. The examples may also be a good starting point to understand the difference between My Lisp and the dialect of Lisp you are used to. As far as defun is concerned, the My Lisp “equivalent” is define. ### 5/5 — Get it, use it, you won’t regret it *2020-07-19* Has parens matching now. Keeps getting better and better. ### 5/5 — Great for learning LISP *2020-07-04* I wanted to have on device LISP interpreter to do examples as I go along Peter Norvig AI Paradigm book. This app makes LISP just a swipe away. ### 5/5 — Learn one of the best languages out there *2020-06-16* This app rocks. I love it! ### 5/5 — Brilliant *2020-04-18* Works great, just what I needed to work through sicp on my phone. Thank you! ### 3/5 — (expt 2 63) looks odd *2019-11-12* (expt 2 63) 9223372036854775807 Otherwise a nice app, hoping to do some serious number crunching with it. ## Frequently asked questions about My Lisp ### What is My Lisp? My Lisp is a complete Lisp environment that runs directly on your iPhone, iPad, and Mac. It includes a local interpreter, an editor, and extensive libraries for programming and learning Lisp. ### What Lisp dialects does My Lisp support? My Lisp is true to the original John McCarthy Lisp implementation and also incorporates core and mathematical operators from dialects like Le Lisp, Lisp 1.5, MacLisp, Common Lisp, and Scheme. ### Does My Lisp require an internet connection? No, My Lisp operates entirely locally on your device. The interpreter executes directly on your iPhone, iPad, or Mac without needing any server connection. ### What kind of mathematical functions are included in My Lisp? My Lisp features built-in functions for advanced mathematics, including complex numbers and numerical analysis tools like a roots and zeros finder and integral approximation. ### Can I learn Lisp using My Lisp? Yes, My Lisp provides library and example files with source code for classical functions and problems, serving as a reference for learning Lisp and developing your own programs. ### How much does My Lisp cost? My Lisp is a paid application priced at $3.99. This one-time purchase provides access to the full Lisp environment and its features. ### What devices is My Lisp compatible with? My Lisp is designed to run on Mac, iPhone, and iPad devices, offering a consistent Lisp development experience across the Apple ecosystem. ### How often is My Lisp updated? The latest version, 2.14, was last updated on March 9, 2025. Updates typically include new features, bug fixes, and performance improvements for the Lisp environment. ## Version history (last 5 releases) ### 2.14 — 2025-03-09 - Turtle push/pop functions. - New examples. - Minor fixes. - Documentation and user manual. ### 2.11 — 2024-09-01 - New examples. - Fixes for expt function. ### 2.10 — 2024-08-15 - Turtle & logo language. - Inspector editor. - Editor tweaks. - New examples. - Minor fixes. - Documentation and user manual. ### 2.02 — 2024-02-19 - Inspector window. - Debugger. - New examples. - Minor fixes. - Documentation and user manual. ### 2.01 — 2023-04-10 - New radix library file. - New examples. - Fix unicode characters handling. - UI fixes. - Documentation and user manual. ## Apps similar to My Lisp | App | Rating | Price | Category | | --- | --- | --- | --- | | [Carnets - Jupyter](https://appshunter.io/ios/app/carnets-jupyter/id1450994949) | 4.6 (316) | Free | Developer Tools | | [Python and Jupyter – Juno](https://appshunter.io/ios/app/python-and-jupyter-juno/id1462586500) | 4.6 (1,086) | Free | Developer Tools | | [Carnets - Jupyter (with scipy)](https://appshunter.io/ios/app/carnets-jupyter-with-scipy/id1559497253) | 4.6 (87) | Free | Developer Tools | | [LispPad Go](https://appshunter.io/ios/app/lisppad-go/id1565747728) | 4.9 (36) | Free | Developer Tools | | [Code App](https://appshunter.io/ios/app/code-app/id1512938504) | 4.0 (300) | $6.99 | Developer Tools | | [CodeSnack IDE](https://appshunter.io/ios/app/codesnack-ide/id1397424959) | 4.4 (1,548) | Free | Developer Tools | ## More apps by Laurent Rodier - [Prairial](https://appshunter.io/ios/app/prairial/id697920083) - [Polyhedra 3D](https://appshunter.io/ios/app/polyhedra-3d/id741648895) - [BaseCalc](https://appshunter.io/ios/app/basecalc/id791106163) - [My RPN Calc](https://appshunter.io/ios/app/my-rpn-calc/id807032892) - [Numerals 123](https://appshunter.io/ios/app/numerals-123/id966689313) - [ITU Morse Codes](https://appshunter.io/ios/app/itu-morse-codes/id1150640591) All apps by Laurent Rodier: https://appshunter.io/developer/697920086 ## Related topics [laurent rodier](https://appshunter.io/ios/topics/laurent-rodier) --- *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 2026-08-23.*