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.
These features are often increase cost of developing an app. Development timeframe â 2-5 months, interface design â up to 160 hours, development (mobile and backend/BaaS) â up to 900 hours, around 25% of which is reserved for PM and QA together. Average cost to develop an app is around $45000-$55000.