Apps that are made for Amazon shopping, Apple Store shopping, and thousands of other online shops are called what? Web store apps? What's the correct terminology? If you're developing an iOS and Android app for such a project what would you need to be familiar with? Also what might be used to tie in the app with the e-commerice web site back-end? i.e. what frameworks and other communication like JSON etc. Basically I want to create a web shop on a large scale and its app.