It's not 90% of iPhone owners. It's 90% of the people using his app. In other words, 90% of his 'customer base' is people who wanted to try it for free, or di

It's not 90% of iPhone owners. It's 90% of the people using his app. In other words, 90% of his 'customer base' is people who wanted to try it for free, or didn't find it worth paying for, or wouldn't pay for it anyhow. It's a red herring. It's making him think more people want his app than really do... At least, at the price he's asking.