An app, short for “application,” is a software program designed to perform a specific task or set of tasks on a mobile device or computer. Apps can be downloaded and installed onto a device, and they typically have an icon on the home screen that can be tapped to open the app.

There are a wide variety of apps available, ranging from games and social media platforms to productivity tools and utility apps. Some apps are free to download and use, while others require a one-time or subscription-based payment.

Apps can be developed for a specific platform, such as iOS or Android, or as web apps that can be accessed through a web browser. Many apps are designed with a user interface that is optimized for mobile devices, with features such as touch-based input and responsive design.

Overall, apps have become a ubiquitous part of modern digital life, providing users with a wide range of functionality and convenience on their mobile devices and computers.