although its not mention how to install and where to install on a distributed or clustered environment.
I am positive that the TA should be installed on all components, e.g Search Head, Indexer and if you are using Heavy Forwarder to collect the data, enable the input from there.
the App wit the visualizations, dashboards etc should be installed on the Search Head.
looking here: https://splunkbase.splunk.com/app/3471/#/details
it seems this app is built by Splunk. you can always contact support and verify
hope it helps
