# Jupiter ACE vs learnFORTH

The clearest difference is rating: learnFORTH at 5.0 against Jupiter ACE's 4.0. learnFORTH also leads on review sentiment (100% vs 67%) and update cadence (every 5 days vs every 63 months). Jupiter ACE's advantage is iOS requirement (15.0 vs 18.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

learnFORTH holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews point the same way: 67% of Jupiter ACE's written reviews are positive against 100% of learnFORTH's.

Jupiter ACE ships an update every 63 months, learnFORTH every 5 days. The most recent releases landed on October 2, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Jupiter ACE | learnFORTH |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (8 ratings)](https://appshunter.io/ios/app/jupiter-ace/id590389822/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/learnforth/id6796084884/reviews)** |
| Number of ratings | **8** | 3 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 63 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 35 MB | 2 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Memention Holding AB](https://appshunter.io/developer/286367873) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### Jupiter ACE

[App page](https://appshunter.io/ios/app/jupiter-ace/id590389822)

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.

**Highlights:** Forth programming language simulation, 1982 home computer emulation, Educational retro computing experience, Freely available source code, iPad compatible

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

**In-app purchases:** none


### learnFORTH

[App page](https://appshunter.io/ios/app/learnforth/id6796084884)

Learn the compact, stack-based Forth programming language through structured daily lessons and interactive exercises. Explore its history and applications in embedded systems and retro computing.

**Highlights:** 90 structured daily lessons, Interactive REPL with syntax highlighting, Hands-on exercises with hints, Progress tracking and daily streaks, Reverse Polish Notation primer, Historical notes on Forth dialects

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

**In-app purchases:** none


## Frequently asked questions

### Is Jupiter ACE free?

Jupiter ACE is free to download, with no in-app purchases.

### Is learnFORTH free?

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

### Which has better reviews, Jupiter ACE or learnFORTH?

learnFORTH is rated higher. Jupiter ACE averages 4.0 out of 5 from 8 ratings, while learnFORTH averages 5.0 from 3 ratings.

### Do Jupiter ACE or learnFORTH have ads?

Neither Jupiter ACE nor learnFORTH shows ads.

### Which is updated more often, Jupiter ACE or learnFORTH?

Jupiter ACE ships an update every 63 months, and learnFORTH every 5 days. Most recently, Jupiter ACE was updated on October 2, 2026 and learnFORTH on September 21, 2026.

---

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