In brief
iOS 11 will end support for 32-bit apps. Once the new system launches, the iPhone 5 and earlier models, along with iPad models using the A6 processor and earlier models, will no longer receive updates.
Apple began notifying developers as early as 2014 that they would need to submit 64-bit versions of their apps. At the time, Apple also needed to accommodate older devices running on 32-bit architecture, so it continued to allow 32-bit apps to be listed. Now, with WWDC about to take place today, Apple has already restricted searches for these older apps in the App Store.
Every year, after Apple releases a new version of iOS, it drops support for some older device models. In the past, changes to the system architecture were relatively small, so only a limited number of models lost support—something iOS users will likely have experienced. With iOS 11 set to be announced at tonight’s WWDC, the system has now moved entirely to 64-bit architecture. Combined with the expiry of Apple’s deadline for developers to update their apps, this means 32-bit apps will no longer be supported at all.
This means that once the new system is officially released, some older 32-bit devices will lose support. The iPhone 5 and earlier models, as well as iPad models using the A6 processor and earlier models, will no longer receive updates. http://qooah.com/2017/06/05/32-bit-apps-ios-11-2/