Very customizable (I like having number row always visible, and having long press for symbols on each letter).
Has gif support built in.
My biggest pain point is:
It auto corrects words that are spelled correctly to other words. I type "our" and it changes to "out", I recently typed "purpose" and it changed it to "purple". Autocorrect is awesome and necessary, but I hate that it corrects words to other words and not just typos. I wish I could find a keyboard that has the things I like without this annoyance.
I like autocorrecting typos, I don't like autocorrecting words into other words. As far as I've found you can't have one without the other. Correct me if I'm wrong though.
Well SwiftKey advertised with some AI (actually just algorithm) that could analyse the words you typed before and glean from context what you are trying to say and correct accordingly. I find it's wrong more often than not so I keep autocorrect off. Also I use SwiftKey in two languages, English and my native language, Dutch. It does not anticipate in which language it should predict at all. It mostly just favours English.
Yeah that's exactly the kind of thing I don't want. If I wrote a word and it's spelled correctly, I wish autocorrect would leave it alone instead of incorrectly guessing a different word. Oh well, one can dream.
Same, been using it long before it was bought by Microsoft. It has customizations I like, and (when it works properly) I can copy and paste between my phone and computer.
I've turned off autocorrect long time ago. Suggestions are fine. The one click more when I'm wrong is worth my time and I'm automatically educated to type correctly.