In short, sports betting apps are not very different from an online sportsbook or a physical sportsbook. They are also all licensed and regulated by the state of Colorado. Sports betting apps are optimized for mobile devices in terms of their usability and how they interact with your internet connection and / or cell phone service provider.
Online sportsbooks is a term that refers to sportsbooks that are accessed via a website, and brick-and-mortar sportsbooks are physical locations that are licensed to operate as a bookkeeper.