I understand what Bobby was getting at in his original post, but I don't mind paying a nominal fee for more convenience. MTH probably did a cost analysis, and obviously felt it was worth it, and I'm glad they did. The market will tell companies what is and is not successful. I'm sure this has already been mentioned, but I believe the wifi unit is needed to make it compatible with older engines, and as Mr Muffin indicated, the TIU doesn't have a wifi adapter. It's easier for me to use the iPad, because I having frying pans for hands. Apps are becoming more popular in many fields, including TV. Maybe with a new generation of engines, we will communicate directly with the engines.
Andy