When searching for a web developer for your fitness app, consider platforms like Upwork or Freelancer, and check their portfolios and reviews. Also, this resource (https://www.cleveroad.com/blog/smart-fitness--how-to-build-a-runkeeper-app-and-become-the-market-leader/) provides valuable insights on building fitness apps, guiding you through the process. Best of luck with your fitness app development journey!