iOS 11 compatible devices

Guesses only (as there are no official announcements yet!) Related:Group Buy SEO Tools

iPads

1. iPad Air 1
2. iPad Air 2
3. iPad Pro 9.7-inch
4. iPad Pro 12.9-inch
5. iPad mini 3
6. iPad mini 4

iPhones

1. iPhone 5c
2. iPhone 5s
3. iPhone 6
4. iPhone 6 Plus
5. iPhone 6s
6. iPhone 6s Plus
7. iPhone SE
8. iPhone 7
9. iPhone 7 Plus

iPod

1. iPod touch (sixth generation)

Plus any new iOS devices that are released between now and then: the iPad Pro 2, for instance, and the iPhone 8

Source :iOS 11: Apple patents dynamic, finger-detecting touchscreen keyboard

Although I believe that apple will not be providing the update to iPhone 5c and 5s!

;)SH