This is from the actual page:
PdaNet+ is one of the top Android applications of all time. PdaNet+ shares the Internet access of your Android phone with your computer or tablet. PdaNet+ works on all Android phones without rooting. It also does not require a tether plan, that will save you $20/month from most carriers.
I've been using Foxfi and now PdaNet for a long time. It works well.(Wired tether, since JB update) It's tethering app, not a free data app.....If you don't have an unlimited data plan, I would be very careful.