This app's functionality has been added to the Splunk App for SOAR (https://splunkbase.splunk.com/app/6361/). We recommend you use that app for this functionality and future updates.
The Splunk Add-on for Phantom allows ITSI and Splunk Enterprise to get various Phantom log data. This add-on is required in order to use the Content Pack for Monitoring Phantom as a Service. For more information, see the documentation:
https://docs.splunk.com/Documentation/ITSICP/current/Config/AboutPhantom