Currently I have the Coaches Eye video analysis app on my i phone and i pad. I have found this app to be the simplest and most efficient. It allows me to draw multiple lines on the screen and it computes degrees of angles, etc. It really allows the student to understand plane, path, club alignments, face alignments, spinal alignments and a host of other concepts by clearly seeing the images on the screen. At some point after the lesson I move the videos to my photo and video library on my phone. Then I text certain swing videos to my students with a summary of the analysis from the lesson. This follow up has created a environment that helps expedite the learning process for the student. I wish we had this technology years ago.