Apple Thoughts: Do You Need to Track Your Data Usage?

"When users had unlimited data there was no reason to be concerned with how or where that data was being consumed. Since AT&T dropped unlimited data in favor of tiered data caps, though, users have struggled to understand data usage, and now AT&T is faced with a law suit accusing it of systematically overcharging customers."

DataMan is what the author suggests, and it sells for $1.99 USD in the iTunes store [affiliate link]. You can also get the free lite version [link] if you just want to test it out before getting the full version that allows more functionality and "more precise" monitoring, as you can see in the image above. I still have the unlimited data plan so I don't worry too much about it, but it appears this app can really break it down for you if you need specifics. What do you use to track your data?