This presentation was presented at Droidcon Stockholm 2015: Synopsis: We are all living in the age of data and we should make our decisions according to the data collected. Every user who downloaded our app is unique and valuable for this reason we should know him/her better in order to improve his/her live and provide a 5 star user experience. In this talk we will discuss data driven development approach at Truecaller. We’ll dive into product metrics and analytics as well as tools and techniques, see how collecting and reading data in the right way can help you to improve your product, engage users and increase monetization. This presentation aims to create awareness of the value of data driven development and provides some tips for starting to take advantage of it. Everyone involved in the mobile application world could find it interesting, from indie-developers to product owners of B2B and SaaS projects. Presented by: Sergio Cucinella Dmitry Avchukhov