Apple's iPhone 6 Plus and fourth generation iPad are now officially retro.

Apple's first large-screen iPhone and fourth-generation iPad are now classified as old-fashioned products, which means that service and maintenance options are extremely limited.

Apple first defined the device as "old-fashioned" because it had not been sold for five years. Until then, Apple will provide repairs and replacement parts for its equipment, but after that, maintenance depends on which components are available to the store.

The latest iPhone, which is classified as vintage, is the iPhone 6 Plus launched in 2014. The iPhone 6 Plus and the simultaneous launch of iPhone 6 are very different from previous designs.

The iPhone 6 and iPhone 6 Plus are larger than their predecessors and introduce a new, thinner chassis. The iPhone 6 has a 4.7-inch screen, while the iPhone 5s has a 4-inch screen. The iPhone 6 Plus goes a step further, with a 5.5-inch display becoming Apple's first large-size phone.

IPhone 6 is not on the retro list. Apple sold the iPhone 6 Plus for three years after it released the iPhone 7 series, which is why it stayed.

The fourth generation iPad is a rapid release after the 30-pin connector iPad 3. It is also the first iPad with a Lightning connector.

Seven years later, old-fashioned products were reclassified as outdated products. According to local laws around the world, there are exceptions, but in almost every market, Apple does not retain any inventory of parts for outdated equipment.