Do not be hasty to upgrade to iOS 11
great changes will happen in iOS 11
and several apps will not run on it
Performance in iOS 11 is optimized for 64-bit devices. App developers must update 32-bit apps before they work with this version of iOS.
You should have got it to day you can read all about it in read more in the Program update on your device, iOS 11 introduces hundreds of new features on iPhone and iPad. They include, among other things, an all-new App Store, a smarter and more proactive Siri, Camera and Image enhancements, and enhanced reality enhancements that allow you to create truly captivating experiences. iOS 11 is also the biggest version ever for iPad with powerful multitasking features, new app files, and more ways to use Apple Pencil.