Apple has announced that the future versions of IOS will not support 32-bit apps. If 32-bit apps are not updated to 64-bit, users will not be able to use it anymore. If you are still trying to use them then it will slow down the performance of your device.
In future, there are no chances for running 32-bit apps. As reported in many of the Mac sites, The latest update from Apple says that there will be a pop-up warning given if the user is still running 32-bit Apps on iOS 10.3 beta version. The same is applicable for future versions as well. The pop-up message will be “developer of this app needs to update it to improve its compatibility”.
A couple of years back, Apple announced to its developers that all new apps developed after 2015 February 1st must support 64-bit. Soon after that they even announced that all updates to apps must be 64-bit compatible. Those apps built 32 -bit platform after June 2015 will be rejected by Apple Inc. Last year September they also announced if any apps in the app store are not working then they will be removing them from the app store.
Apple has not specified they will run on 64 bit alone in particular versions of iOS. Since this is a major update, it can be assumed that the same will be implemented in iOS11. This update will be announced officially in its Developer conference this summer.
The switch over to 64-bit support indicates that older iOS devices built on the architecture cannot be upgraded to the latest versions of iOS. 32-bit and 64-bit refer to the amount of data that can be managed by the processor.Since the 64-bit processor can process more amount of data at a time and with the enhanced performance when compared to the 32-bit processor.