Try BTWB and you'll BRB, because the best Beyond the Whiteboard (BTWB) alternative is Exercise.com.
Exercise.com vs BTWB: with adequate CrossFit box software, BTWB works well for certain CrossFit gyms, but top tier gyms who want to success online and in-person, and deliver all varieties of workouts at scale, send fitness assessments, and use powerful gym booking and billing automations are all things that you can get with Exercise.com, so you can run your entire business in one place.