Great products aren't lucky. They're designed to be loved.

usercase.design is a weekly, illustrated teardown of the apps you already use. Each one takes a single flow (an onboarding, a paywall, a streak) and slows it down frame by frame to reveal the behavioral science underneath.

Loss aversion, the goal-gradient effect, variable rewards: the same handful of principles show up everywhere, once you know where to look. The point isn't to admire them. It's to help you spot them, and put them to work in whatever you're building next.