Best Buy today announced it has expanded its Upgrade+ program to include the iPad Pro and Apple Watch Ultra. Launched in October in partnership with Apple, the program provides interest-free monthly financing via Citizens Bank for select Apple products purchased from Best Buy in the U.S., similar to Apple's iPhone Upgrade Program. The program is also available for the latest models of the MacBook Air, MacBook Pro, iMac, Mac Studio, and Mac mini, including the new 15-inch MacBook Air. The monthly payments are spread across three years. After 36 months, customers who purchase an eligible iPad Pro, Apple Watch Ultra, or Mac have the options of upgrading to a newer device, paying off the remaining balance of the purchase in…