Apps are outdated. The development goes to use normal (html5) browser as (ajax) client. You could check the capabilities of your ie-browser on the qlik demo-site: Qlik Demos: See QlikView in Action | Demo.Qlik.Com. For me with windows phone 8.1 it worked in general but features like object single-mode seems not to work (but I haven't tested it long). I assume with the next version (windows 10) many things will work like the other browsers.