Castor EDC is described as 'Castor offers you a user-friendly and fully featured application for electronic data collection. It's developed by researchers for researchers and will definitely meet your needs' and is an app in the sport & health category. There are more than 25 alternatives to Castor EDC for a variety of platforms, including Web-based, Windows, Mac, Linux and iPhone apps. The best Castor EDC alternative is GNU Health, which is both free and Open Source. Other great apps like Castor EDC are SimplePractice, Carepatron, REDCap and OpenEMR.