While there is not an official USCCA Community App, there is a way to create a shortcut on the home screen of your mobile device so you can quickly and easily access the Community.
iPhone Users
In Safari use the box with the arrow at the bottom of the screen:
Then scroll to Add to Home Screen:
Google Device Users
In Google Chrome, click the add to home screen option: Thanks to @Zee for the screen capture on a Google device.