Jupiter ACE vs (LispLab)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jupiter ACE
Explore the history of computing by learning the Forth programming language on a simulated 1982 home computer. This educational tool provides an authentic experience for aspiring programmers interested in retro technology.
- Forth programming language simulation
- 1982 home computer emulation
- Educational retro computing experience
- Freely available source code
- iPad compatible
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Go back in time and learn to program Forth with this Jupiter ACE on your iPad. The Jupiter ACE was a home computer released back in 1982. While all other home computers at the time used BASIC as the built in programming language, the Jupiter ACE used Forth. This emulator is built with freely available documents and source code. Project files are available on github. Jupiter ACE is trademark of Andrews UK Ltd.
(LispLab)
Master the Scheme programming language with structured lessons, a built-in interpreter, and interactive exercises. Track your progress and explore functional programming concepts, including a new module for the beginner-friendly Logo language.
- 90 guided Scheme lessons
- Built-in REPL and interpreter
- Exercises with hints
- Progress tracking
- Logo module included
- Light/dark themes
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Learn Scheme, the elegant Lisp dialect that shaped modern programming. (LispLab) helps you go from your first parenthesis to real fluency with 90 structured lessons, a built-in REPL, and hands-on exercises. Study core ideas like lists, functions, recursion, higher-order functions, and data structures one day at a time. Features: • 90 guided Scheme lessons • Built-in REPL and interpreter • Exercises with hints and instant feedback • Progress tracking and daily streaks • Light, dark, and automatic themes • Now includes a Logo module! Logo is a member of the Lisp family, but with graphics and a design to appeal to new programmers. Perfect for beginners, students, and programmers exploring functional programming.
Screenshots
Verdict
The clearest difference is rating: (LispLab) at 5.0 against Jupiter ACE's 4.0. (LispLab) also leads on review sentiment (100% vs 67%) and update cadence (every 2 months vs every 63 months). Jupiter ACE's advantage is in-app purchases (none vs 1) and ratings volume (8 vs 1). On price, ads, monetization model and device support 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
Both are free to download. (LispLab) sells 1 one-off in-app purchase. Jupiter ACE asks for nothing beyond the download.
(LispLab) holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Jupiter ACE has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of Jupiter ACE's written reviews are positive against 100% of (LispLab)'s.
Jupiter ACE ships an update every 63 months, (LispLab) every 2 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.
| Parameter | Jupiter ACE | (LispLab) |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (8 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 63 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 35 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Memention Holding AB | John Kennedy |
Customer experience
Jupiter ACE
(LispLab)
In-app purchases
Jupiter ACE
No in-app purchases
(LispLab)
- Buy Me a Coffee$0.99
