image credit: Matrix Rain by docmiller on deviant art, CC BY-SA 3.0
I recently had a problem. I was seeing intermittent issues with an iPhone app, Tapatalk, not working properly with a web forum hosted by a friend of mine. I knew there was a much better chance of getting the bug fixed if I could a) prove it was a bug and b) show the devs exactly where the problem was, but I was hampered by the usual problem: iOS apps are a bit of a black box and I couldn't see what it was doing internally.
However, like almost all network-aware iOS apps, this one was clearly using a web service to get data from the backend. So all I needed to do w