The app is an iOS version of a simulation game created by mathematician John Horton Conway. It is a universal application that can be enjoyed on iPhone, iPod touch, iPad, iPad mini, and iPad Pro.
The app features the classic "koikoi" Hanafuda rules with intuitive flick controls and an auto-save function. Players can collect Ukiyo-e artwork by winning matches, with higher scores yielding better collections.
The app includes 2000 TOEIC-level words divided into 50 lessons. Users can practice spelling, look up word meanings, and back up their data to the cloud.