What are emoticons in Android and IOS, are they just unused characters codes in UTF-8 that developers decided to map cute pictures to?
If so, are they standardized? (e.g. a smiley face on android is a smiley face on IOS?)
Emojis are standardized UTF-8 character sequences that are the same across multiple devices.
Here's their documentation: http://unicode.org/emoji/charts/full-emoji-list.html