Developing the mobile apps is very easy Now.

Hi There

If you are a web developer, It’s easy to develop mobile applications.  You must know about HTML, CSS and Javascript.

Apache Cordova is a platform

for building native mobile

applications using HTML, CSS

and JavaScript

You just follow these links  you can get clear knowledge about developing the mobile apps

https://cordova.apache.org/

https://cordova.apache.org/docs/en/4.0.0/guide_cli_index.md.html