I agree with anonymous. The emojis are sometimes very different so depending on who's sending what the emoji you send/receive can be confusing and come off in the wrong way. If the app could sense what type of emojis are being sent and match them it would be great.

I know this can be done in the settings already, but I think it would be really convenient if it could be tied to specific contacts. John uses an android, Mark uses an iPhone. The emoji match the person