The cost of building a web application depends on a number of factors such as:
Functionality: If the app demands complex third-party integrations, multiple APIs, databases, dynamic content, hosting, mobile compatibility, and more, it escalates the costs UI/UX design: If you desire to go for custom UI/UX designs for your apps than the ready-made design templates, you will have to pay more. The uniqueness of the project: If your app demands specialized knowledge and skillsets from highly-experienced and qualified developers, your app development costs may scale up.