OK I'm probably asking a question that has already been asked multiple times but here goes anyway. I just received my OBDLinkMX+ scanner tool for my 15 Dodge Dart. I have read for best results use the alfaobd app. There is a demo version in the google playstore and a full version for 49.00 dollars. Is there a free version I can download or do I have to buy the app to be able to access all the features of the obdlinkmx+ scanner? I'm already 100 bucks in for the scanner. Do I really need to spend another 50 to be able to use it correctly? Sorry, I'm asking but I'm a little new to this new technology.