A step-by-step guide on how to build a SaaS (Software as a Service) application from scratch to deployment! Building an application to provide business is tough. It's overwhelming. There are so many choices! What gems do you use? How do you manage users? What if there was a step-by-step guide to feed you those answers? This book will guide you from your very first rails commands, through integrating Stripe, background jobs and finally deploying your app to a cloud provider. You'll be mastering a SaaS application, getting customers and monetizing your expertise in no time! Worried the material won't help you build a complex application? I am currently running Userveys using the very same code and techniques from the book. This book will walk you through building an app with Rails. A basic understanding of Ruby (or another programming language) will help you get the most use of all the chapters in this book. In addition, you can grasp the examples throughout the book if you understand variables, conditionals, loops, and methods within the Ruby language.