A phone app is a software application designed specifically for use on mobile devices, such as smartphones and tablets. These apps are typically downloaded from an online store or marketplace, like Google Play Store or Apple App Store, onto your device where they can be accessed at any time. Phone apps provide various functions and services to users, ranging from entertainment (games, music, videos) to productivity tools (calendars, notes, reminders), social media, navigation, shopping, and many more. They are an essential part of the mobile experience, making it easier for people to access information, communicate, and perform tasks on-the-go.