Google just released a brand new keyboard for iOS - Gboard. It's a regular swipe-enabled keyboard that arrives with a killer feature: it allows you to search Google for whatever you've just typed by simply tapping a button. You can then easily copy and paste the search result of your choice to the text box you're currently inputting text.
Predictive search, as well as contacts search are also on the feature list, which is nice. Something that's missing is the support for other languages - you can only use Gboard in English right now, but that's a minor gripe. The regular scope of keyboard features has also made the cut: auto-capitalization, character previews, auto-correction, case switching, and emoji suggestions are a go.
All in all, Gboard will save you a few taps and clicks here and there, and definitely has potential. Needless to say, it's free to download and use.
Download: Gboard (iOS)