Simply put, yes, there are many use cases. Concrete example: Various timers with a better interface for the specific task I want to do (meditate, pomodoro, workout, etc) and no ads.

There’s no reason I really need those four different apps on my phone with a login and ads and tracking and 100 page terms of service.

Claude can write them for me today. It’s be even better if I just ask my phone for them and they pop up in a couple minutes.