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.
Depending on your development model and the tool or partner you use to develop the app, this will hourly rate will vary. The calculated median cost at $100/hour for iPhone app development is $25,275.00 to $114,300.00. The median cost at a higher rate of $150/hour is $37,912.50 to $171,450.00. The maximum cost figures at $100/hour and $150/hour, respectively, were $485,000.00 and $727,500.00. It is important to keep in mind that these figures do not include the ongoing maintenance costs and updates that apps require.