Within RackEmApp, we support Double Elimination based upon a template system, where we have set up the structures that allow Double Elimination competitions to be contested.
Out of the box, we support those that you can see in the list in Competition Management. We believe that these are the most likely/most popular double elimination competitions in use. This list is pre-filtered based upon the number of entries you have. So it won’t show a 64 man double elimination template if you only have 31 entries.
However, if there is a type of template that is not in the list, just let us know on hello@rackemapp.com and we can probably add it. Just give us 2 weeks notice and we’ll see what we can do.