I'm looking to get HPTuners at some point this year. I don't know much about it yet. I have a couple questions...

1. Do you have to buy a scan gauge or OBDII scanner in order to use HPTuners?
2. I've read that it comes with 5 credits, is that one per vehicle? Or is that how many times you can retune your vehicle?

if there is already a thread about this, i apologize. i tried reading on the HPTuners website, but my questions were not answered by that.