welcome! i asked the same question on here a while back. not a whole lot of info on specifics, but there's at least a few name drops lol! http://www.chevycobaltforum.com/forum/f16/does-anybody-use-ultraguage-ii-5936/
clicky^
i'm still tempted to wait til i get a new phone, and them getting the torque app for it. not sure what imma do acshualllly lol
The Autel Maxiscan MS509 looks like it has all the features I need, but It"s from china, I don't think I want to waste my money to find out that it's junk