The development process of a fitness app development company involves several stages such as market research, app design, coding, testing, and deployment. To develop a fitness app, you will need a team of experienced developers, designers, and project managers. The development cost of a fitness app can vary depending on several factors such as app features, development team location, and customization requirements. The cost to make a fitness app can range from $40,000 to $200,000 or more.