QUOTE
Subscriptions for iOS apps will work much the same way as we’ve already seen with The Daily. Publishers can charge subscriptions on a weekly, monthly, bi-monthly, quarterly, semiannually, or yearly basis, and customers can sign up via in-app purchases that get automatically billed and renewed on their iTunes accounts. With this method, Apple takes 30 percent of subscription fees.
http://www.macworld.com/article/157927/201...scriptions.html?