How to save on annual Apple App Store subscriptions, with a catch (opens in new tab)

Apple's contract-style subscription payments for annual subscriptions have arrived on the App Store. Here's the details of how they work, and what to look out for.Apple is letting developers offer a new subscriptionAnnual subscriptions are usually cheaper than monthly plans, but until recently, require upfront payment before users know if an app is worth a long-term commitment. Apple is now offering a contract-style subscription system for some third-party App Store apps, allowing users to sp...