Gboard

Gboard is the single most useful third-party keyboard I’ve used. From Google, Gboard is, of course, focused on search. The beauty of Gboard is that you don’t have to leave whatever app you’re using to search for things to share, whether it’s a GIF you want to post to Twitter, an image you want to paste into Messages, or a URL you want to add to an email. Search results also return emoji, YouTube videos, and things like flight data and weather from Google.