At the current time, Weighfish is completely free to use for Tournament Directors and Competitors.  Administrators of the site monitor it closely for abuse.

How and why do we do this?  We want to build a good user base right now and allow you as tournament directors to get a feel for how it works.

There may be a time in the future where premium features are added to the mobile app that will cost to use.  There may also be a maximum number of entries in a tournament before a cost is associated.  Neither of these are present currently.  We will always have a free option for small tournaments, as this is what started Weighfish from the beginning.