Windows 8 and Windows Phone 8 bring a new way of monetizing your app – in-app purchases. This is the mechanism powering very popular business model of other app stores – so called Freemium or Free-to-play apps and games. In this talk we will cover these concepts on a business level as well as dive into technical details of implementing these models in your Windows 8 and Windows Phone 8 apps. We will also cover other monetization techniques such as direct app sales, trials and advertising.