Software development depends on a wide variety of intertwining factors and dependencies. Because of their complexity, projects often have a bad track record for sprouting quality, usability, cost, schedule and overrun risks.
App users are surprisingly demanding. When they click on the download button, they expect an attractive and easy to use interface, infinite updates, great customer support, full documentation, and a fast solution to whatever problem it is they are trying to solve – all of this for .99 cents or less.
Fixed price contracts can be rather tricky in a Scrum environment. Classic software development and Agile software development are very different from one another, and things that work in one environment don’t necessarily work in another.