Use Apple's Emoji Keyboard
I really prefer the native Emoji Keyboard over WRIO's adapted version of it. The emojis are bigger, there's a greater variety and "most recent" is more adequate than WRIO's.
It's be cool to include a setting "Use native Emoji Keyboard" so that the smiley-button links to the native Emojis (rather than using the globe button which is one click further away)
I also think that switching to WRIO's emojis takes too long.