I received permission from Xyrus-02 (https://www.deviantart.com/xyrus-02) to cross post his Apophysis F.A.Q. here at Fractal-Resources (https://www.deviantart.com/fractal-resources) The blog can be originally found here: https://apophysis.deviantart.com/blog/36316365/ :) I'm re-posting this here as I also receive a lot of questions concerning Apophysis.
Getting Started
Where do I get Apophysis? Is it expensive?
Apophysis is free, open-source software. That means, it does not cost you a cent. In addition, everyone is able to change the software using
the available source code. This is also why there are different
versions of Apophysis:
Apophysis 2.x
The "official" or "main" version of Apophysis. You can down