Q. How much will it cost?
A: Cost is a function of time. Time is a function of work. Work is a function of scope, and scope comes from you. So it all depends on what you want to build. Websites run from around a thousand dollars to tens of thousands of dollars for a fully custom developed site with enhanced functionality and cutting edge technologies. Mobile apps can run as low as a few thousand to over a hundred grand. Custom Software can start at a few thousand for developing a prototype or Minimal Viable Product (MVP), or run into the millions of dollars for an innovation that requires teams of developers over years. There is an axiom in software development and engineering in general: There's cheap, fast, and done right. Pick two. It is impossible for all three to be true. The answer to how much it will cost is with you, the customer.