FAQ

In recognition of Bayesian pioneer Sir Harold Jeffreys, JASP stands for Jeffreys’s Amazing Statistics Program.

JASP itself consists of two different executables which are licensed under slightly different terms.
The JASP-Engine, where our R code runs, is distributed under GNU GPLv2
But the JASP-Desktop, the user interface,  is distributed under GNU Affero GPL v3

Yes — More importantly, it is released under a Free and Open Source license, which means that even if we turn evil, we will not be able to take JASP away or prevent others from contributing to it, working on it, or distributing it freely. This excerpt from our license sums it up nicely:

The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, our General Public Licenses are intended to guarantee your freedom to share and change all versions of a program — to make sure it remains free software for all its users.

JASP is currently supported by long-term, multi-million euro grants that help fund a team of motivated software developers, academics, and students. Our two main software developers and several core team members have tenured positions. The Psychological Methods Group at the University of Amsterdam is dedicated to long-term support for JASP. Finally, the JASP code is open-source and will always remain freely available online. In sum, JASP is here to stay.

The JASP application is written in C++ and QML, using the Qt toolkit.The analyses themselves are written in R and use many packages from CRAN. The results display layer runs in Qt WebEngine and javascript + jQuery.