Web apps are not real applications; they are actually websites that open in your smartphone with the help of a web browser. Mobile websites have the broadest audience of all the primary types of applications.
Benefits :
o Easy access.
o Easy Development: Developing responsive design and restructuring the content to be properly displayed on a smaller screen/hardware will make any desktop website mobile friendly.
o Easy update: Just update in one location and all the users automatically have access to the latest version of the site.
o No installation required, as compared to native or hybrid app.
Disadvantages :
o Mobile websites cannot use some of the features. For example, access to the file system and local resources isn’t available in websites.
o Many existing websites don’t support offline capabilities.
o Users won’t have the app’s icon on their home screen as a constant reminder. The website needs to be opened in a web browser only.
o While native and hybrid apps appear on the App Store and Google Play, web apps won’t. So redistribution is not that sensible.