Many app-to-app transactions are only possible on a mobile phone. While a responsive mobile site can interact with apps, it is very limited. In such cases, a mobile app will serve your business intent better. There are two kinds of app-to-app interactions. One is passing data from one application to another and the other is when one app provides certain functionality to another app. One feature of using another app's functionality is that it usually works in the background and provides results on the owner’s interface. For instance, an app can send a user’s location to GPS data for a location or an app might even ask for permission to access the user’s contacts or camera. Mobile app developers can also set boundaries for interactions with other apps by restricting how other apps can interact with your app