Learn how to build a custom internal mobile app without mobile development expertise in this 90-minute tutorial. Discover how to use Retool to create an app for tracking and managing internal processes, suitable for teams without dedicated mobile developers. Follow along as Kevin Whinnery demonstrates building a book tracking application, covering topics such as writing SQL queries, customizing mobile and web interfaces, connecting buttons to actions, transforming API data, implementing refresh functionality, and integrating camera-based ISBN scanning. Gain insights into Retool's capabilities, target audience, and potential for creating standalone apps without app store involvement.