Globally, the systems fall into two types. This is a different cardinal in the construction of architecture. There are those who store your information locally and this information is only visible on your phone. If you accidentally delete the program then all data will be lost. So basically games of various types, training products and stuff like that. And the second kind is the storage of data on the server, it is any type of social network, CRM and other public systems. Fundamentally you can say - the information you see only you and the systems in which your information is seen by others and it is publicly available. We offer the services of just such systems that work with servers.
It will not work without an application programming interface. It is a specific set of functions and methods that allows a client to send data to a server. Actually, information exchange with a server are serviced by them.
A programm uses it to interact with a server, which is responsible for all the calculations. Your info will not be sent to a server and saved, you can’t watch a video in your application without an especially designed API for Android development of which is required if your app works on Android. Therefore, the development of backend logic, which is associated with a mobile application, is a must have.