need app to track Evo4g wifi hotspot usage

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http://androidforums.com – I pay for Sprint's wifi hotspot feature on my Evo 4g. Im rooted, but can't use tether because my computer is incompatible with tethering. Im going to be using the hotspot a lot in the near future, so I want a way to track how much data I use thru it. That is the only thing I need to track (3g and wimax 4g hotspot). Is there any app out there that will do the trick? (General)