The Complete Guide to Salesforce App Building When you hear “app building,” what’s the first image that comes to mind? Caffeine-fueled programmers working around the clock to pump out tens of thousands of lines of code? A large team of developers huddled around a whiteboard? How about an inexperienced user casually creating an entire app in under an hour? Building an app in minutes without experience may sound optimistic, but that dream is a reality with Salesforce’s Lightning App Builder.