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.
Development timeframe up to two months, interface design â up to 80 hours, development (mobile and backend/BaaS) â up to 500 hours, around 25% of which is reserved for project management (PM) and testing (QA) together. Average cost to develop an app is around $25000-$35000. An example of such app can be RecallEmail â a personalized email client with a delayed send feature (1 month, 2 people) and Fewler â a mobile client for emergency fuel refill delivery service working in NY (2 months, 2 people).