Your web application needs to meet the expectations of users who are used to using only the best. That’s why your application needs to be made by an experienced and professional web development firm.
At the very least, a respectable application is powerful enough to provide useful functions, has a design attractive enough to pick interest and a user interface that’s simple enough to be intuitive. And as if that wasn’t enough, those applications have to be made to work within several limitations, from server capabilities to user’s internet speed to development budgets. We minimize these kinds of limitations as more as possible.