JASP is a fork of (it was originally based on) Jamovi both are still under active development, which have fairly similar user interfaces, and both saved a good deal of time and trouble by not reinventing the wheel-they are essentially user interfaces for another statistics program, the hard-to-learn-and-use R. Ironically, each one has a much faster user interface than SPSS-and all import and export SPSS. Each has advantages and disadvantages, and there is nothing stopping you from using all three depending on what you are trying to do. I have taught statistics using JASP, Jamovi, and PSPP. and does this work on Mojave? Is it signed and 64-bit? What about cryptographic signing and error messages when you try to install free statistical software for Macs? See our “ signing page.”. Free statistics software for Macintosh computers (Macs)