My Lisp vs Pascal Playground
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
My Lisp
A comprehensive Lisp programming environment for iOS and macOS devices. It offers a local interpreter, editor, and extensive libraries for learning and developing Lisp programs, including advanced mathematical functions and symbolic derivation.
- Local Lisp interpreter
- Integrated editor
- Core and mathematical operators
- Advanced mathematics functions
- Symbolic derivation module
- Library and example files
- User and reference manuals
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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)))))
Pascal Playground
Write and run Pascal code instantly on iOS devices without any setup. This app offers a focused programming experience inspired by the classic Turbo Pascal environment, featuring a distraction-free editor and built-in examples. It's designed for both experienced Pascal users and newcomers.
- Instant Pascal code execution
- No setup required
- Distraction-free editor
- Offline code running
- Built-in examples
- Retro Turbo Pascal theme
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Turbo Pascal, reimagined. Write and run Pascal code instantly, with no setup required. This app brings a clean, focused programming experience inspired by the classic Turbo Pascal environment, adapted for modern iOS. • Run Pascal code offline • Simple, distraction-free editor • Built-in examples to get started • Retro Turbo Pascal-inspired theme Whether you are revisiting Pascal or just curious to try it, everything works instantly. No accounts. No setup. Just code.
Screenshots
Verdict
The clearest difference is review sentiment: My Lisp at 69% against Pascal Playground's 0%. My Lisp also leads on in-app purchases (none vs 3) and chart position (#85 vs unranked). Pascal Playground's advantage is price (Free vs $3.99) and update cadence (every 4 days vs every 6 weeks). On ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Pascal Playground is free to download; My Lisp costs $3.99 up front. Pascal Playground sells 3 one-off in-app purchases. My Lisp asks for nothing beyond the download.
My Lisp ships an update every 6 weeks, Pascal Playground every 4 days. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.
| Parameter | My Lisp | Pascal Playground |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.1 (17 ratings) — better | — |
| Positive reviews | 68.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 17 — better | — |
| Update frequency | Every 6 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #85 — better | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 19 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Laurent Rodier | Igor Kulman |
Customer experience
My Lisp
Pascal Playground
In-app purchases
My Lisp
No in-app purchases
Pascal Playground
- Support Small$0.99
- Support Medium$2.99
- Support Large$4.99









