With the mobile phones being used more than anything else right now, the technology and new apps on it need some innovations as well. There are multiple mobile operating systems right now the popular ones include, Android OS, iOS, and Windows. All of these operating systems have their own UI and stores that provide various functionalities to its users.
For developers, it is hard to build an app separately for all the phone operating systems so we need cross-platform apps to develop apps only one time but can be used by every OS. The cross-platform app provides a single code that can be commonly used by all the phone OS alike.
For more information, look at the infographic below.
Infographic by: zenesys