Apple has officially launched Apple Upgrade , a leasing program that lets customers pay monthly for an iPhone, iPad, Mac, or Apple Watch instead of buying the device outright. The program went live today on Apple’s website in partnership with Klarna, replacing the iPhone Upgrade Program that Apple has offered since 2015. The lease length depends on what you’re planning to get. Phones and watches get shorter terms, 12 or 24 months, while iPads and Macs stretch to 24 or 36 months,...