Imagine you are trying to open your 32-bit app on iOS 11 and you get a message which says “the app needs to be updated to work with the new operating system.” So, where millions of iPads and iPhones are updated to iOS 11 on September 19, the older 32-bit apps that have not been updated with iOS 11 support will no longer launch.
Since Apple has not yet officially released a final statement, but had warned its customers about this upcoming condition during the launch of iOS 10.1 in October 2016. During this event, Apple informed that older apps may slow down your iPhone. As of iOS 10.3, a more explicit message has been provided: “This app will not work with future versions of iOS.” So, you cannot even get the 32-bit app on your New App Store, nor you can get them through previously downloaded 32-bit apps, which will be installed through the Purchased tab.
If you are a current iOS 10 user, you can check if there is any 32-bit app on the device in the Settings app. Go to General –> About –> Applications to see the “App Compatibility” section that lists any outdated apps.
On the other hand, customers who have older devices like the iPhone 5 and 5c which can’t install iOS 11, will not be affected. iOS 11 is only compatible with devices that feature a 64-bit chip, meaning it works with everything that has an A7 or newer chip. Specifically, iOS 11 is compatible with iPhone 5s, SE, 6 Plus, 6, 6s Plus, 6s, 7 Plus, and 7, along with the new fifth-generation iPad, the iPad Air, the iPad Air 2, all iPad Pro models, the iPad mini 2 and later, and the 6th generation iPod touch.