SAN JOSE, Calif.—When Apple releases the next version of iOS in the fall, it’s going to leave a handful of older iDevices behind. This year, two phones and one tablet are getting the axe: 2012’s iPhone 5 and fourth-generation iPad, and 2013’s iPhone 5C.

These iPhones and iPads are definitely slower than their newer counterparts, but this time around the compatibility cutoff has less to do with things like RAM or raw performance. These three gadgets are the last iDevices to use 32-bit processors (the Apple A6 in the iPhones, the A6X in the iPad); beginning with the iPhone 5S and the iPad Air in 2013, all of Apple’s iPhones, iPads, and iPods since have included 64-bit chips.

iOS 11 will run on: