If you want to see what is really happening in your swing you have to use video. I have an iphone6 and the slow mo feature is brilliant. When I think back to the old camcorder footage it’s really amazing to see the advances in technology. Furthermore, you can now do an instant analysis using a free app. I’m currently using Hudl Technique which was recommended by a pro I know. So far so good, very easy to use. Highly recommended.