3. IKamasutra Positions Guide
The book this app is based on is greatly overhyped. The sexual stuff only really comes at the end (giggity), and most of it is useless because most people do not bend as if they are made of Playdoh, nor can they hold the weight of three people with their ankle. The app on the other hand, simply features the positions and the instructions you need, along with ratings such as how easy the position is and how you may improve the experience.