The Apps, Integrations, and Automations pages, acessible from the sidebar, allows you to see a list of apps (also the generic term for "apps" that fall into any of these categoires) currently installed on your Hubitat Elevation hub as well as install new instances of any built-in app or already-installed custom app code. Apps are categorized into one of these three types and will appear only in the maching list. (Tip: if you aren't sure where to find a particular app, use the search box and see if any matching app names are found in other categories — you'll see a note below the search results if so.)
Examples of built-in apps include Motion Lighting, Basic Rule, and Rule Machine. Things you can do with these apps include turning lights on or off based on motion, sending notifications in response to certain events (e.g., door opens), or pretty much anything you can imagine as long as the devices you want to automate are added to your hub.
For information about built-in apps themselves, see: Apps/Integrations/Automations Documentation.


To change the view type between List style and Grid style, select the appropriate icon at the top right of the Apps, Integrations, or Automations page. The options are list view (default for desktop):

and grid view (default for mobile):

The toggle at the top shows the current view and lets you switch between them (e.g., select List if currently in grid view to switch to list view, as in the above screenshot).
When you load the Apps, Integrations, or Automations page on a new hub, it may look similar to the below (just likely with fewer apps installed since you have not installed any yet). To install a new app, select Add App or Add Built-In App (labeled H below) from the upper-right corner of the Apps page — or th esimilar Add Integration or Add Bult-Integration or Add Automation or Add-Built-In Automation button on the Integrations or Automations pages:

This page also dispalys information about installed apps, integrations, or automations. Columns may vary depending on your display settings options (see below):
TIP: Can't find an app you installed? If you are not seeing apps that you think you should in the list, make sure you have the "parent app" expanded (select the arrow to the left of the app name to expand/collpase the list of "child apps").
Rather than removing an app you suspect may be causing an issue with your hub or device, you can simply disable it to see if the problem is resolved.

Disabling an app prevents any app code from running. Disabling a parent app will not disable child apps (but may or may not affect their operation in other ways).