Apple is adding a new App Store subscription option that lets developers offer lower monthly prices in exchange for a 12-month commitment. “This model will allow developers to offer discounted rates to customers in exchange for more predictable long-term revenue,” reports TechCrunch. “This also caters to how many developers have already been marketing their annual subscriptions in their apps.” From the report: Often, app developers will display the lower monthly price to highlight the discount the customer would receive if they purchase the annual subscription instead of the monthly option.…