Are you sure it is a good idea to show your clients a way to your competitors? What if they decide to choose Crew.co instead of services you offer?)
I think this app was build to attract attention of potential clients, and as marketing strategy it works perfectly well. But if you want to know how companies calculate the price of software development here is an interesing article https://qubit-labs.com/realistic-software-development-cost-estimation-agile-projects/.
My favourite books are "Thinking, Fast and Slow" and "Rework". I would strongly recomend them for those people who care about their business and team building. Luckily, they are not ones of those who try to proclaim their business in a hidden oe even open way; they are more practical.