Tapatalk is now a benefit of being a paid supporting member of the site. Along with additional private message storage, a gallery for photos, a larger avatar image and signature images and access to an additional color scheme for the site, you get Tapatalk access. It's $30 a year to help offset the hosting, maintenance and upgrade costs to keep the forum running. The site is fully functional in mobile browsers, but adding Tapatalk is an additional effort that we need to support through memberships. Here's the link to the paid subscriptions: http://www.cj-8.com/forum/payments.php
Hope that helps. Let me know if you have any other questions.