Item: Koikoi
Rating: 80
Author: Dinsun

Our Site Score

80/100

Koikoi (Hanafuda) is a beautiful digital implementation of the traditional Japanese card game. If you've never played Hanafuda, the art alone is worth the download—the 'flower cards' are gorgeous. This app does a great job of highlighting which cards in your hand can match those on the table, making it much easier for beginners to learn the 'suits' (months).

The strategic depth comes from the 'Koikoi' call itself—deciding whether to end a round early with the points you have or to keep going for a bigger score at the risk of your opponent stealing the round. The AI is quite competent, and the sound effects of the cards 'clacking' together provide a tactile satisfaction that makes the experience feel authentic.

Reviewed on: Fri Feb 27 2026

Dinsun Review

I’ve always had a soft spot for Hanafuda. There's a certain weight to the history of it that most mobile games lack. This app does a respectable job of bringing Koi-Koi to the digital screen. The card art is the star here—vibrant and clean. The gameplay is exactly what it should be: a tense balance of pushing your luck and knowing when to fold.

However, the AI is a bit of a letdown. It’s either incredibly lucky or makes bafflingly poor choices, with very little middle ground. And while I appreciate the lack of fluff, some modern quality-of-life features like a detailed rulebook for beginners would have been nice. It’s a solid, conservative card game app for those who already know what they’re doing. It doesn't try to be anything else, and I respect that.

Overall Stats

Pros & Cons

Beautiful, traditional card art
Faithful Koi-Koi mechanics
No intrusive monetization

Inconsistent AI difficulty
Lack of a deep tutorial for newcomers
Basic sound design

Technical Report

Performance: Extremely fast and lightweight. Zero crashes.

Accessibility:

Card Highlight Mode

Audience Fit

Buy if: You enjoy traditional card games and appreciate Japanese culture and art.

Skip if: You find pattern-matching card games boring or want high-speed action.

Similar Games:

Hanafuda Koi-Koi Enjoy
Mahjong Solitaire
Solitaire

Reviewer Context

Reviewer: Dinsun
Hardware: iPhone 15 Pro Max
Playtime: 8 hours
Status: Won 50 matches

The Game

Available on: iPhone, iPad, iPod

618834958

$1.99 4+★3.4 5 reviews

Author : Kouichi Hayashi

Pubish Date : Tue Mar 19 2013

Last Update Date : Mon Apr 21 2025

Support Languages : English and Japanese

Genres :

Version 2.0.4Mon Apr 21 2025

The developer has changed from Googoleplex Ltd. to Hayashi Koichi's own business.
This is why the support URL has been changed.
Koikoi is a game of Hanafuda (Japanese Playing Cards).
-How to play Koikoi
Throw away the card to the table into play alternately. If there is a match of the month, you can get the cards.
You will be able to finish the game to get a point if your cards are flush. You are also possible to continue the game.
Can not score with each other and no game.
The winner is who get more points total 12 times game.
Game record will be saved automatically.
Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.
Koikoi is a game of Hanafuda (Japanese Playing Cards).
-How to play Koikoi
Throw away the card to the table into play alternately. If there is a match of the month, you can get the cards.
You will be able to finish the game to get a point if your cards are flush. You are also possible to continue the game.
Can not score with each other and no game.
The winner is who get more points total 12 times game.
Game record will be saved automatically.

Ratings & Reviews

3.4 out of 5 with 5 Counts

★★★★★

Age Rating 4+

Koikoi is a traditional Japanese card game played with Hanafuda (flower cards). The goal is to form special card combinations called 'yaku' to earn points. When you form a yaku, you can either stop the round to take your points or call 'Koikoi' to continue the game in hopes of scoring even more. This version features beautiful art and intuitive gameplay.

Features

Authentic Hanafuda artwork

Helpful matching guides

Multiple AI difficulty levels

Traditional ruleset

Tips

Matching the Months

Cards are divided into 12 months, each represented by a flower. Match a card in your hand with a card of the same flower/month on the table to capture them both.

Gameplays

Calling Koikoi

If you complete a set, you'll be asked if you want to call Koikoi. If you do, you continue playing. If you complete another set, your score doubles, but if your opponent completes a set before you do, you get zero points for that round!