rSPR is a software package for calculating rooted subtree-prune-and-regraft distances and rooted agreement forests. Version 1.2.0 includes an implementation of the cluster reduction and edge protection and is significantly faster than the previous versions in many cases. rSPR is available as C++ source code under the GNU GPL v3. This is free software, and you are welcome to redistribute it under certain conditions; See the README for details.