All things considered, it is a pretty good app. With the comparison of other translations side by side with the NWT, it could backfire on the WTS. It might just make some JW's think about the differences. It certainly is a step up to the modern era for the WTS...
I doubt that they could do tracking with an iPhone app, since Apple has to approve the app before it can be downloaded. If they want to find me, I am not making any secret of where I go or what I do!