Meteor single app for web and mobile?

Hello everyone, I’m trying to develop an app that needs to have a mobile version and a web version that works exactly the same, similar to apps like Facebook/Instagram. I read about the Ionic framework and I don’t understand how the web app interface is created since all the elements in the framework are for Mobile apps.
PS: The idea is also to have the mobile app working on the website and as real app from store.