It is hard to say how much data a app my use but unless there is a reason you wouldnt want it, I would go with the unlimited data plan to play it safe.
lflor73 wrote:I havent gotten a phone in years but am planning to buy one this weekend. If I get a android one app I want is to track my investments between 930am-4pm each weekday. Which I usually do thru Google Finance but would be great if I could access it directly from my phone. Does this use up the data plan quickly? Would I need to buy an unlimited plan? Thanks in advance,
I use an app called "Stock Quote". It's free and has lots of info available and tracks stocks in real time.
It's in the Market.