Even Yoshi-P has gone on record to kind of make fun of the use of "third party tools" by bringing up the fact that a person with enough patience could do the exact same thing as ACT using a calculator or MS Excel, because technically, both considered a third party tool. And how are we (as in Yoshi-P is asking this question) going to know if you use a calculator or Excel?
It's a hard line in the sand, that they won't really ever know you cross. And even they acknowledge that. They just draw that line to intimidate people not to use them so they don't have endless ridiculous reporting wars and such.
https://www.youtube.com/watch?v=e_i6mjiGerU