Thirty-One is made and published by Koichi Iwasaki. AppBrain is an independent app data site and isn't affiliated with Koichi Iwasaki. The app name, icon, screenshots and description belong to Koichi Iwasaki and are shown as published on the App Store.
About Thirty-One
Thirty-One is a games app developed by Koichi Iwasaki.
User Ratings
The app has no ratings yet.
App Information
Thirty-One is freely available from the App Store. The app size is 100.80 MB. The latest version available is 1.0.1. The last update was on February 20, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since December 2025.
Screenshots
Also available on Google Play
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Changelog of Thirty-One
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Developer information for Koichi Iwasaki
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App Store Rankings for Thirty-One
Technologies used by Thirty-One
Frequently asked questions about Thirty-One
Is Thirty-One free?
Yes. Thirty-One is free on the App Store.
Is Thirty-One still available?
Yes. Thirty-One is on the App Store, and the last update we saw was on February 20, 2026.
How large is Thirty-One?
Thirty-One is 100.80 MB.
Is Thirty-One suitable for children?
App Store rates the content of Thirty-One as suitable for everyone.
Who made Thirty-One?
Thirty-One was developed by Koichi Iwasaki. It is listed in the games category on the App Store.
What are the best alternatives to Thirty-One?
People looking at Thirty-One also look at these games apps: Easthaven Solitaire FeinGames, ゆるキャン△かるた, Spades+, Crazy Eights Classic Card Game, Spades Royale: Online + Single.