Thirty-One

Name: Thirty-One
Author: Ko-chan Studio.

LiveKo-chan Studio.30 apps · 23.9K installsCardFree · contains adscom.KohchanStudio.Thirtyone

Play 31: The classic card game! Simple rules, deep strategy. Outsmart the AI.

Alert me ★ Watch Open in Play ↗

Total installs: 691
Installs / day: —
Rating: —★
Released: 20 Dec 2025
Last update: 15 Feb 2026
Countries: —

Install history

exact counter from Google Play

30dAll

Installs per day · last 90 days

Change timeline

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Data safety

declared by the developer on Google Play

No data shared with third parties
Collects data Location, App activity, and Device or other IDs
Data is encrypted in transit

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

4 in 1 group

0 Sensitive1 Notable3 Routine

OtherNotable4

Access to miscellaneous device features that don't fit other categories

Keep your phone's processor or screen from going to sleep, which can use more batteryprevent device from sleeping · WAKE_LOCK
Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
Connect to the internet to load content and send datafull network access · INTERNET
Check with Google Play that you got this app legitimatelyGoogle Play license check · com.android.vending.CHECK_LICENSE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description

"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!"

What's new

Optimized CPU AI and decision-making logic. Fixed a display bug during CPU actions. Improved game flow and pacing.

Growing in Card

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