I am blessed to have the Bible on my iPad. I read it every day and nothing I have read has ever hinted that I should be catholic. I still think that is one world religion junk. Why would anyone believe that? It may happen in my lifetime but catholics believe stuff that is not Biblical.
Catholics believe what the Church teaches. The Bible in your iPad comes form the same source, the Catholic Church. Does the Church teaches beyond what it in the recorded Scripture? Of course. Does the Church contradict the Scripture? Of course not; that would be for the Church to contradict herself.
However, the foundational principles of Protestantism contradict the Holy Scripture. That is a serious problem.