I have tried every third party iOS keyboard including Microsoft Word Flow, Fleksy, SwiftKey, Swype, Microsoft Hub, TouchPal, Typeeto, Clipped among other. Some of them are very good and some are not.
But yesterday I installed Googles Gboard and finally I found a third party keyboard worth using.
Gboard allows you to search google directly from the keyboard without leaving the app you are using. It can also search for images, gifs and even emojis. The keyboard is fast and it also has a built in Swype style text input.
After using it for the last 24 hours I can say I am hook. This is a super convenient keyboard.