If you've ever wondered just what's going on inside some of those apps on your phone, you'll want to take a look at this!
Secret iOS business; what you don’t know about your apps
Developers can get away with more sloppy or sneaky practices in mobile apps as the execution is usually further out of view. You can smack the user with a massive asynchronous download as their attention is on other content; but it kills their data plan. You can track their moves across entirely autonomous apps; but it erodes their privacy. And most importantly to me, you can jeopardise their security without their noticing; but the potential ramifications are severe.