An all-in-one app combines various app features under one interface, on a single app, making it easy for users to do tasks that they would usually use multiple apps for. All-in-one apps are also known as super apps. The best example of a super app is WeChat. Pretty simple. All-in-one apps combine various app features in one interface. In the age of mobile apps, a combination of different apps in a single space seems quite smart as it makes it easy for users to do tasks that they would usually use multiple apps.