Thirty-One
Thirty-One Summary
Thirty-One is a ad-supported Android app in the Card category, developed by Ko-chan Studio.. First released recently released ago(Dec 2025), the app has accumulated 450+ total installs
Store info: Last updated on Google Play on Dec 20, 2025 .
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App Description
Play 31: The classic card game! Simple rules, deep strategy. Outsmart the AI.
"Simple yet deep! The classic card game ""31 (Thirty-One)"" is now available as an app! Experience thrilling tactics as you try to get your hand total as close to 31 as possible. The rules are simple, but winning requires real strategy. From beginners to pros, this is the definitive card game for everyone.
◆ Face off against unique rivals! Challenge six distinct characters, each with their own playstyle:
Newbie: A beginner whose unpredictable moves might surprise you.
Aggressor: A bold player who loves to ""Knock"" early.
Tactician: A strategist who calculates maximum efficiency.
Stoic: A steady player who prioritizes not losing above all else.
CPU Master: The ultimate AI that calculates every probability.
◆ Customize the rules your way! Fine-tune the game settings to match your favorite playstyle:
Should Aces (A) count as 11 points?
Should Three-of-a-Kind count as 30.5 points?
Will you allow ""Blitz"" or ""Sweep""?
Use your best strategy to defeat the ultimate CPU Master!"