For me it seems XF can do almost the same things as iFactr does (http://ifactr.com/) . I am still unsure what the pros and cons are. My first impression is that iFactr has better platform support such as support for Windows 8 etc. I also read Xamarin is required if one is using iFactr. For me XF and iFactr are looking very similar.
Can someone contrast and compare the two?