Smart draw review is not a good product and do not download the trial version as the require you to purchase the product before you are able to really use it or see how it truly functions.

Mine broke after 10 days and I had to return it. The wrist band is very cheap. I'm an adult 49 years old if it breaks on me and my use I wonder what it would do for someone real active in their 20's

Not the best book but good Kindle book for review of topics and advanced configurations. Do not suggest this book as a study guide due to the information is not complete.