This document provides information about mobile applications or "apps". It discusses that apps are easy to use and inexpensive, typically costing between $1-5. It also outlines some key factors to consider when choosing a mobile device like intended use, hardware budget, and whether the person prefers Apple or Android products. The document then covers app marketplaces for different operating systems and how to set up accounts to access apps. It provides some top recommendations for universal apps and resources for finding new apps.