Apple rolled out a subscription service today that will allow publishers to put their content on apps and charge for them through the App Store. The subscription billing service is based upon what they and News Corp have done with The Daily. By applying the App Purchases billing system to a content subscription model, publishers will be able to set prices and lengths of subscriptions and offer them to consumers at various levels of commitment. By putting it all in a centralized location specific to content publishers, users will be able to manage and monitor all of their subscriptions at once….