An online resource that makes for comparing iPhone applications, MyBefia is not only useful but easy to put into practice. In general terms, all you have to do is provide the title of three different applications that interest you, and then you can see them pitched one against the other. On the other hand, it is also possible to enter only one application and have it automatically compared to its most similar competitors.
As the programmer himself explains on the site, this web-hosted service was born because he wanted to know what goes into creating an outstanding iPhone application. Although there are already sites that provide information on ranks and trends, he claims this one is the first that will let you understand how an iPhone application is behaving at a given moment and over time. Moreover, it will let you see who its main competitors are at a glance.
You can see this system in action for yourself at www.mybefia.com, and start comparing different applications on the fly. Whether you want to do so out of curiosity or because you are planning on purchasing one, this site is certain to provide some food for thought.