It only takes a small amount of user friction to cause an app to hemorrhage users. And even apps that manage to remain sticky despite user friction will see their users struggle to find the intended value in all its features. As a product manager or developer, you want to squash user friction from your app. But first, you not only need a strong grasp of what user friction looks like, but you also need to be equipped with product analytics that can systematically identify its sources in your app so you can stamp it out. Here's how.