IPhone :: App That Will Track How Many Times Used Each App?

I have scores of apps on my iPhone (and iPad). Many, many I've never used since the day I installed them or only used a couple of times. It'd be interesting to have an app that would tell me how many times I used each, and that way I could get rid of the ones that haven't been used in the past month or two. In fact, I wouldn't even mind a mass delete of the ones I haven't used in months!

I'm thinking, though, that such an app would require inter-communication with other apps, or system-level monitoring that only Apple could provide. Hey, maybe there's something in Settings that would show that?! I know that I discovered after too many months the Usage screen buried inside Settings that tells me how much space each app is taking up.

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iPad, iOS 5.0.1, Wonderful, magical device!