Twitter has taken steps to address the inequality of emoji.
While many simple emoji require just two characters, others can take up as many as 14. Twitter says this is due to the differences in the way written text emojis are encoded versus more complex emoji that include gender or skin tone.
Tweets have a 280-character limit, so some emoji consume more of a potential tweet than others. Twitter wants to be sure all users have plenty of room in tweets for expressing ideas.
Twitter will now count all emoji, including those that string together a higher number of characters, as just two characters.
Twitter updated its Open Source Library accordingly so app writers can build these changes into their own apps.