A mobile app is a software application designed to run on smartphones and tablets. These apps can be downloaded from app stores like the Apple App Store or Google Play Store. They serve various purposes, including social networking, gaming, productivity, and more, making it easy for users to access services and information on the go. Mobile apps are typically built for specific operating systems, such as iOS or Android. They can be native, meaning they are developed for a particular platform, or cross-platform, allowing them to function on multiple systems. This versatility helps developers reach a wider audience.