Welcome to a remarkable part of early 1980s home computing.

This app focuses on the Jupiter ACE experience and is loaded with example software. Please note that the system is completely self-contained and this means you cannot remotely add code, more games etc.


The Jupiter ACE was a home computer released in September 1982. It was created by Jupiter Cantab, a Cambridge company founded by Steven Vickers and Richard Altwasser, who were both involved in the development of Sinclair computers. The ACE distinguished itself from other home micros of that era by opting to include the Forth computer language instead of BASIC.

Despite a short lived sales period the computer earned the respect of those owners that embraced it for development. It is now sought after by collectors, fetching many times the value of other competitor computers released at that time.

The Jupiter ACE trademark, logo, ROM and many of the included programs are under trademark and copyright licenses from – Subvert Ltd

Many thanks to all the developers of the loaded ACE software who have all granted permission to include their titles in the app and enthusiasts that helped source content. We hope this list of software will continue to grow in future updates.

Also special thanks to those owners of the original computer that have helped verify the accuracy of this app.

What’s New

Version 1.0.1

• iOS/iPadOS 15 tweaks
• Updated some of the program descriptions (check out Colin Dooley's Valkyr tattoo)
• Cross Chase game by Fabrizio Caruso

Ratings and Reviews

5.0 out of 5
6 Ratings

6 Ratings

Descriptivist ,


A masterpiece. Unless you owned a Jupiter ACE (which not that many people did), this is better than nostalgia—it's a glimpse of a different path, one that the home computing revolution of the early '80s never quite took. It's also a fun way to learn Forth, a classic programming language that is probably otherwise most associated with the "embedded systems" world (from computerized gizmos to space probes).

Developer Response ,

Thank you for sparing time to write such a positive review. It was a pleasure creating this app largely because the original computer had such a clean architecture. Satisfying to read that it conjures nostalgia. We’ll continue to update the app to keep the ACE alive on this platform.

App Privacy

The developer, Andrews UK Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary based on, for example, the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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