# RETRO FORTH vs My Lisp

The clearest difference is price: RETRO FORTH at Free against My Lisp's $3.99. RETRO FORTH also leads on rating (4.4 vs 4.1) and iOS requirement (12.4 vs 18.0). My Lisp's advantage is review sentiment (69% vs 33%) and chart position (#81 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

RETRO FORTH is free to download; My Lisp costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RETRO FORTH holds the better App Store score, 4.4 against 4.1. Both are backed by a comparable volume of ratings — 5 and 17 respectively. Written reviews complicate that: 33% of RETRO FORTH's written reviews are positive against 69% of My Lisp's, so the app with the better star average is not the one people write more warmly about.

RETRO FORTH ships an update monthly, My Lisp every 6 weeks. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | RETRO FORTH | My Lisp |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/retro-forth/id1170943580/reviews)** | [4.1 (17 ratings)](https://appshunter.io/ios/app/my-lisp/id1245341806/reviews) |
| Number of ratings | 5 | **17** |
| Positive reviews | 33.3% of reviews | **68.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#81** |
| Size | 4 MB | 19 MB |
| Requires iOS | **12.4** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Charles Childers](https://appshunter.io/developer/900749636) | [Laurent Rodier](https://appshunter.io/developer/697920086) |

## What reviewers say

### RETRO FORTH

[App page](https://appshunter.io/ios/app/retro-forth/id1170943580)

A compact and adaptable concatenative programming language designed for ease of learning and customization. It features a code editor, interactive listener, and support for Gopher servers, allowing for flexible development.

**Highlights:** Concatenative programming language, Code editor with Markdown subset, Literate programming style, Interactive listener interface, Gopher server data fetching, File manager, Documentation browser

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### My Lisp

[App page](https://appshunter.io/ios/app/my-lisp/id1245341806)

**Currently charting:** #81 Top Paid · Developer Tools (US App Store)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RETRO FORTH free?

RETRO FORTH is free to download, with no in-app purchases.

### Is My Lisp free?

My Lisp costs $3.99, with no in-app purchases.

### Which has better reviews, RETRO FORTH or My Lisp?

RETRO FORTH is rated higher. RETRO FORTH averages 4.4 out of 5 from 5 ratings, while My Lisp averages 4.1 from 17 ratings.

### Do RETRO FORTH or My Lisp have ads?

Neither RETRO FORTH nor My Lisp shows ads.

### Which is updated more often, RETRO FORTH or My Lisp?

RETRO FORTH ships an update monthly, and My Lisp every 6 weeks. Most recently, RETRO FORTH was updated on October 16, 2026 and My Lisp on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*