Snowball feature costs $

There was no indication Id have to pay for the snowball feature on the description. What is the use of this free app if that feature is disabled? The reason I needed to try it before buying it is because other apps snowball features are buggy. (They dont recalculate correctly when you switch between methods.) To try it out on this one, I will have to purchase it, and hope for the best. What a waste of my time (and potentially money).

Gurl Friday about Debts Break