Comparison

My Lisp vs IconGPT

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Local Lisp interpreter
  • Integrated editor
  • Core and mathematical operators
  • Advanced mathematics functions
  • Symbolic derivation module
  • Library and example files
  • User and reference manuals
Features
Read full description

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)))))

About

IconGPT

Generate professional app icons quickly using AI. This tool offers optimized prompts and real-time previews to help independent developers create visually appealing icons without design experience. Save icons in high resolution for immediate use.

Highlights
  • AI-generated app icons
  • Optimized prompt enhancement
  • Real-time home screen preview
  • Icon import and preview
  • Save icons in 1024x1024 resolution
Read full description

Create App Icons with a Single Prompt! We understand the needs of independent developers and aim to provide you with a simple, efficient solution for generating app icons, so you can focus on your app. Whether or not you have design skills, our AI technology helps you create professional, visually appealing icons. Key Features: • AI-Generated Icons: Use advanced AI to quickly generate unique app icons and solve design challenges. • Optimized Prompts: Simply enter a description, and AI will enhance it to create a professional-quality prompt. • Real-Time Home Screen Preview: Instantly preview your icons to ensure they perfectly match your app’s style. • Icon Import & Preview Tool: Import icons via web browser or gallery and preview them in real time. • Save to Gallery: Save generated icons in 1024x1024 resolution, ready to use. Download IconGPT to simplify design and give your app a professional touch!

Screenshots

My Lisp4 screens
IconGPT3 screens

Verdict

The call

The clearest difference is price: IconGPT at Free against My Lisp's $3.99. IconGPT also leads on review sentiment (100% vs 69%) and update cadence (every 3 days vs every 6 weeks). My Lisp's advantage is in-app purchases (none vs 2) and ratings volume (18 vs 1). On rating, 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

CostPrice · In-app purchases · Ads · Monetization

IconGPT is free to download; My Lisp costs $3.99 up front. IconGPT sells 2 one-off in-app purchases. My Lisp asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.1 for My Lisp against 4.0 for IconGPT. That said, the two scores are not equally well evidenced: My Lisp has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 69% of My Lisp's written reviews are positive against 100% of IconGPT's.

UpkeepUpdate frequency

My Lisp ships an update every 6 weeks, IconGPT every 3 days. The most recent releases landed on November 1, 2026 and October 9, 2026 respectively.

Scorecard7 real differences · 4 level
My Lisp versus IconGPT: the parameters behind the verdict, then further details
ParameterMy LispIconGPT
Price$3.99Free — better
Rating4.1 (18 ratings) — better4.0 (1 ratings)
Positive reviews68.8% of reviews100.0% of reviews — better
Number of ratings18 — better1
Update frequencyEvery 6 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#85 — better—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size19 MB36 MB
Age rating4+4+
DeveloperLaurent Rodier旋炜 李

Customer experience

My Lisp

All ratings17 ratings
Positive82.4%
Neutral0.0%
Negative17.6%
Written reviews16 reviews
Positive68.8%
Neutral12.5%
Negative18.8%

IconGPT

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

My Lisp

No in-app purchases

2 purchases

IconGPT

One-time2
  • IconGPT Pro Week$1.99
  • IconGPT Pro Month$7.99

Questions

Is My Lisp free?
My Lisp costs $3.99, with no in-app purchases.
Is IconGPT free?
IconGPT is free to download, with in-app purchases available.
Which has better reviews, My Lisp or IconGPT?
My Lisp is rated higher. My Lisp averages 4.1 out of 5 from 18 ratings, while IconGPT averages 4.0 from 1 ratings.
Do My Lisp or IconGPT have ads?
Neither My Lisp nor IconGPT shows ads.
Which is updated more often, My Lisp or IconGPT?
My Lisp ships an update every 6 weeks, and IconGPT every 3 days. Most recently, My Lisp was updated on November 1, 2026 and IconGPT on October 9, 2026.

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