How can I subscribe without entering my credit card information?
You can register through the App Store where you also manage your subscription billing. Once App Store payment is chosen the billing for the subscription will be managed by the App Store (Google Play or Apple App Store) selected not by The Fitness App.
Download My Fitness by Jillian Michaels App
Android - Google Play App Store
https://play.google.com/store/apps/details?id=com.emdigital.jillianmichaels&hl=en_US
iOS - Apple App Store
https://itunes.apple.com/us/app/my-fitness-by-jillian-michaels/id1190148494
Contact Customer Support at [email protected]