Works... But barely – KBB.com Car Prices & Reviews Review

The app is not optimized for smaller screens, just the iPhone 4S and older screen size (3.5 inches). It is extremely glitchy and slow on my iPhone 7 Plus and 6S, but will technically get the job done. If KBB updated this with support for the iPhone 5/5C/5S/SE screen size the iPhone 6/6S/7 screen size, the iPhone 6 Plus/6S Plus/7 Plus screen size, and the iPhone X screen size, as well as normal performance fixes, it would be 5 stars easily.
Review by Sulkinator on KBB.com Car Prices & Reviews.