The mobile app world took to the freemium model with a passion last year, as revenue from freemium iOS(s aapl) apps eclipsed 50 percent mark in the US about a year ago. But in the last year, the momentum behind freemium apps has only grown stronger, according to new data from app analytics firm App Annie.
App Annie Intelligence, which tracks more than 700,000 apps, found that global revenues for freemium apps on iOS have quadrupled over the last 24 months.





