FrACT is a semiautomated vision test battery, full details here: https://michaelbach.de/fract/. It became FrACT₁₀ running in a browser on all plattforms or as a progressive web app.
The program is mostly written in Objective-J, a language implemented by https://www.cappuccino.dev, and compiled by Cappuccino into JavaScript. [While the Cappuccino site looks a bit lazy, there is a small, select and active community working on it, communicating via Gitter.] Objective-J is modeled on Objective-C and implements much of Apple's GUI. Some parts of FrACT₁₀ are also pure JavaScript. Apple's Xcode is used as the development environment; the GUI is created via Xcodes Interface Builder. The program is started by opening the project-relative top-level index.html in a browser while the directory is hosted by a HTML server.
For more see CONTRIBUTING.md.
… are welcome (via Buy Me a Coffee)
This file is part of FrACT10. © 2026 Michael Bach, bach@uni-freiburg.de, https://michaelbach.de