Don't confuse Amazon "Fire" performance with a "real" Android device. Amazon is subpar in my experience, and is several (many) generations behind.
>Amazon began referring to the Android derivative as Fire OS with its third iteration of Fire tablets. Unlike previous Fire models, whose operating system was described as "based on" Android, Fire OS 3.0 was described as "compatible with" Android.
>Amazon began referring to the Android derivative as Fire OS with its third iteration of Fire tablets. Unlike previous Fire models, whose operating system was described as "based on" Android, Fire OS 3.0 was described as "compatible with" Android.
https://en.wikipedia.org/wiki/Fire_OS