It is amazing what we can accomplish with the help of our smartphones these days. We have yet another use for them in this book. It is a great idea to use your phone to take pictures of what you eat. In order to be really successful, I think, in dieting we need to keep a journal of what we eat. What better what than to use our phones as a tool to help us accomplish this? This is a great book with explanations of how to achieve these objectives.