Mobile general manager Antony Douglas said that the high-end pricing has performed better than other business models on the platform.
"It's actually done a lot more revenue than a lot of free-to-play with in-app purchases or advertising models," he told MCV.
"You've got to sell 12 times that in some cases to get to one game on that £14.99/£20 model.
"Customer behaviour is changing all the time so it's one of many business models that we have and we have all the others under scrutiny as well.
"What I will say about the business model is that it's not fixed. Everyone says free-to-play is the future and that's absolutely part of it, but that will change."
He added: "If you're playing a lengthy £20 RPG title, there will be an audience for that. Some people won't go for it but those people could spend £30 on resource management games. We're looking into it to see how people respond.
"We can't show too much in the way of figures but it hasn't had the negative sales response that some people would think."
Square Enix's recent iOS releases include Final Fantasy Dimensions for £19.99 / $28.99, while a port of DS title The World Ends With You retailed for £12.99 / $17.99.
> Final Fantasy retrospective: A look back at 25 years of the RPG series
Gallery - View screenshots of Final Fantasy Dimensions below:
Copyright: Square Enix