The following are some fundamental characteristics of Splunk apps:
Apps are often referred to as a workbench or workspace
Apps are navigable
Apps can be opened from Splunk's home page, the Apps menu, or indirectly from Settings
Apps tend to focus on the characteristics of data
Apps are based on specific uses
Apps can support varied groups
Apps can be run at the same time as other apps
Apps can include one or more configurations and/or knowledge objects
Apps can be set up to be completely customized
Apps can include HTML, CSS, and JavaScript code
Also, a Splunk add-on is reusable and similar to a Splunk app, but an add-on does not contain a navigable view. You cannot open an add-on from the Splunk Enterprise home page or the Apps menu.