Some Apps Don't Work with iOS 11 & iOS 11.4.1
If you've owned your iPhone 5s for awhile you've probably accumulated a ton of applications. Some of those apps might not work with iOS 11 and iOS 11.4.1.
iOS 11 brings an end to iOS support for 32-bit applications. Apps that haven’t been updated to support 64-bit will no longer work on your iPhone 5s.
Most apps will work with iOS 11, but several popular games, including Flappy Bird, need to be updated with support.
If your favorite game has stopped working, there's nothing you can do. The app requires an update from the developer and the developer probably isn't supporting the app at this point.
If you want to look at what apps no longer work with iOS 11 you’ll want to open your Settings app and tap on General, About, and Applications.
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