A Web App is simply a website optimised for mobile devices (phones/tablets) that look like a mobile Native App, using a Responsive Layout for providing an optimal experience for all mobile devices and orientations (landscape/portrait). A Responsive Layout = Fluid Layout (width %) + Flexible Image (width %) + Adaptive Layout (Breakpoints). I created many Web Apps for the event industry when I was working in Crystal Interactive but I cannot show them here due to copyrights. Here some examples of prototypes.
Web App with HTML and CSS
Type: Web App Front End: Danielmrey Back End: n/a Design: Danielmrey Logo: Danielmrey Language: English Live on: desktop version
Web App with Jquery
Type: Web App Front End: Danielmrey Back End: n/a Design: Danielmrey Logo: Danielmrey Language: English Live on: desktop version
Web App with Jquery Mobile
Type: Web App Front End: Danielmrey Back End: n/a Design: Danielmrey Logo: Danielmrey Language: English Live on: desktop version
Web App with Sencha Touch
Type: Web App Front End: Danielmrey Back End: n/a Design: Mercer Logo: By client Language: English Live on: desktop version