I have a question for anyone out there who understands the domain: in the pre-iPhone days, how much would you have paid for the separate instruments that this a

I have a question for anyone out there who understands the domain: in the pre-iPhone days, how much would you have paid for the separate instruments that this app simulates? I'd have to guess at least a few hundred bucks, right? It amazes me to think that they all can be replaced by a 3.99$ app (assuming it works as advertised and whatnot.)