I guess I just don't really see the point. If you have an Android or iOS device that you are using in the field, chances are you have Internet access and given how outdated some of the DP info is, you're probably better off just doing a completed Ebay search or even doing a Google search which will pull up discussions relevant to whatever you might find from a variety of websites. Most people I know have unlimited data plans and my Droid X has great battery life.
I also don't think it's reasonable to expect us to donate so you can buy a computer, Android device, insurance, rent, etc...If the app is going to be free, I could see raising enough to cover maybe 80 hours of your time at say $30 an hour or $2400. Otherwise, I have no problem paying $5 for it once it's released, but people shouldn't have to do both.