Koikoi

Hanafuda Koi-Koi, anywhere

Two-player Koi-Koi under Nintendo rules, with beautifully drawn cards and a search-based AI opponent.

Download on the App Store
The tide chart on iPhone

Nintendo rules, faithfully

Yaku, scoring, dealer rotation and draws — the classic Koi-Koi rules as you know them. Yaku progress and “reach” (one card away) indicators make the game easy to learn.

Features

  • Four AI levels: topped by a determinized ISMCTS search engine
  • Three ways to play: tap, drag & drop, or keyboard (arrow keys + Enter)
  • One match = one file: save games, resume and review anytime
  • Game Center: leaderboards for wins and best score
  • Multiplatform: iPhone, iPad, Mac and Apple Vision Pro

A closer look

Koikoi on the Mac
Koikoi on the Mac
The moon phase calendar
The moon phase calendar
Your saved locations
Your saved locations
Today's tide on Apple Watch
Today's tide on Apple Watch

Download Koikoi and enjoy the classic hanafuda duel.

Download on the App Store