Creating a solid app with a team of people is just the beginning.  Measuring and analyzing the use of your app is key to app success.  Carefully tracking progress not only aids in understanding how your app is being utilized, but it enables you to focus on whether to adjust features, or devote more energy toward promotion of the app.   By measuring information like shares, comments, likes, and bookmarks you can get a good feel for what your members want more of and content that you should reconsider.