How fast do you know when there’s a problem in your latest version of your app? At Fabric, we built real-time analytics that supports billions of devices. In this talk, I’ll detail how we scale analytics for many apps on nearly every device on the planet to make it easy for any developer to assess the health of their mobile application. First, I’ll talk about our mobile SDK and techniques we use to ensure your mobile applications avoid DDOSing the internet. Second, I’ll talk about how our real-time processing pipeline aggregates data from billions of devices in real-time without impacting accuracy. This talk will discuss our experiences with a lambda-architecture and our use of probabilistic data structures.