DataMan Pro for iPhone or iPod touch for $1, iPad for $2
The iTunes App Store offers DataMan Pro for iPhone or iPod touch for 99 cents. That's $2 off and the best price we could find for this data usage manager app.
It's also available for the iPad for $1.99. That's $2 off and the best price we could find.
2 very similar deals were also reported by some other sources: