In string theory, one of the many vibrational states of the string corresponds to the graviton, a quantum mechanical particle that carries gravitational force. Thus string theory is a theory of quantum gravity.
Their average web application development cost is around $500K and their staff or contractors' salary is in the six figure plus range. Their proposals are usually based on a lot of fluff with the development rate ranging from $400 - $800 per hour. These types of companies focus on custom development.
ReThink's salary survey claims that Â£70k average salary for an app developer is now outstripping the Â£60k for a traditional web developer, although web developers are still ahead when it comes to contract day rates (Â£375 to Â£350).