The bath recipes are good...but, the massage and other types (only) has the amount of essential oils to be used...not, what type of base to be used in addition with it, etc.
I would suggest looking around for something better and not waste your money. Or better yet go to your local massage school and take some classes, sometimes free but, most cost a little bit.
I wasted my money on this app... I was hoping for a bit more knowledge.
Wyldblood about Aromatherapy Guide