According to remarks made by well-known app developer Steven Troughton-Smith, via 9to5 Mac, Apple is planning to drop support for all 32-bit apps when iOS 11 is released. This would prevent many older apps from working on iOS devices running iOS 11.
Although Smith has not divulged his source for this information, he says that he has heard “very clearly” that this is what Apple is planning to do, and certainly there have been many other recent rumours to that effect.
Since iOS 10.3, users opening a 32-bit app would have seen a pop-up informing them that the app should be updated by the developer, but you are still able to use the app.
The first 64-bit applications were supported by Apple with the release of the iPhone 5s in September 2013, and since February 2015 developers have been required to include 64-bit support with any apps that they have submitted to the App Store, and since June 2015 the same has applied to app updates that are submitted.
Source: Apple will reportedly drop 32-bit app support entirely with iOS 11 this fall
