Does downloading an app while on Wi-Fi count towards my data Plan?

I just got a iPhone 3Gs for my birthday. I has unlimited talk and text. My data plan is with my dad, we have Verizon and its the share everything plan. But we can only share 1GB of data a month. So my question is does downloading apps on Wi-Fi go towards my data plan or does it do nothing to my data

Nope, using Wi-Fi is best when on your iphone does eat up all your data.

Nope. As long as you're on Wi-Fi it does not use any data. However, Wi-Fi does drain the battery faster.