Screenshot of the MatchMoji game instructions.

Behind the Scenes

Proprietary Data Collection

Our emotion recognition model is trained from a proprietary data set collected through an iOS app, MatchMoji.  MatchMoji is a game in which players are presented with a set of random emojis. They must match the expression of the emoji and can compete with friends on a leaderboard. 


Players can play the game without sharing any data, or they can play in Train mode which shares data to help improve our model.


Nuance and Self-curation

Because MatchMoji asks users to match an expression, our self-labeled dataset captures both nuance and extreme reactions. While we also review data tags, we rarely adjust and instead let our community weigh in on expression interpretation.

Screenshot of the MatchMoji Main Menu