The cost to build a fitness app like Centr depends on various factors such as app complexity, features, design, and platform selection. Partnering with a reliable fitness app development company can help you estimate an accurate budget based on your specific requirements. Companies offering fitness app development services typically charge between $25,000 to $80,000 depending on the scale and customization involved. For unique features and seamless user experience, investing in custom fitness app development is the best way to stand out in the competitive fitness market.