Thirty-One is made and published by Ko-chan Studio. AppBrain is an independent app data site and isn't affiliated with Ko-chan Studio. The app name, icon, screenshots and description belong to Ko-chan Studio. and are shown as published on Google Play.
AppBrain's verdict
Niche- Total installs
- 690
- Last updated
- February 15, 2026
Thirty-One is a niche app, with 690 installs. It doesn't have enough ratings yet to judge what users think.
Installs
Tracked by AppBrain- Last 30 days
- 15
- Play install range
- 500+
- Launched
- December 2025
Installs over time
Thirty-One has been installed 690 times. Over the past 30 days, it has been installed 15 times.
Rankings
Google Play top chartsGoogle Play Rankings for Thirty-One
Competitors
Similar apps and more from Ko-chan Studio.
Releases
Updates seen on Google Play- Version
- 1.0.2
- Launched
- December 2025
User feedback
Ratings and reviews on Google PlayComments on Thirty-One for Android
We don't have enough comments to show example comments. Please check back later.
Technology
Found in the app by AppBrain- Ads
- Contains ads
- Price
- Free
- Libraries
- ?
- App size
- 47.7 MB
- Content rating
- Everyone
Technologies used by Thirty-One
About the app and developer
About Thirty-One
Thirty-One is a card app developed by Ko-chan Studio.
Download Statistics
Thirty-One has been downloaded 690 times. In the last 30 days, the app was downloaded 15 times.
User Ratings
The app has no ratings yet.
App Information
Thirty-One is freely available from Google Play. The APK size is 47.68 MB. The latest APK version available is 1.0.2. The last update was on February 15, 2026.
Technical Requirements
The app has a content rating of Everyone. The APK has been available on Google Play since December 2025.
App Performance Report
Get a detailed PDF report for Thirty-One with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more
Get PDF Report — $29Developer information for Ko-chan Studio.
Frequently asked questions about Thirty-One
Is Thirty-One free?
Yes. Thirty-One is free on Google Play.
Is Thirty-One still available?
Yes. Thirty-One is on Google Play, and the last update we saw was on February 15, 2026.
Does Thirty-One contain ads?
Yes. Google Play lists Thirty-One as containing ads.
How large is Thirty-One?
Thirty-One is 47.68 MB.
Is Thirty-One suitable for children?
Google Play rates the content of Thirty-One as suitable for everyone.
How many times has Thirty-One been installed?
Google Play lists 500+ installs for Thirty-One.
Who made Thirty-One?
Thirty-One was developed by Ko-chan Studio. It is listed in the card category on Google Play.
What are the best alternatives to Thirty-One?
People looking at Thirty-One also look at these card apps: Thirty One Deluxe (31, Blitz), Thirty One | 31 Card Game, Thirty one - 31 card game., Skip Rummy, Card Rules+ - Card Game Guide.
Store listing
By Ko-chan Studio., from Google Play“Play 31: The classic card game! Simple rules, deep strategy. Outsmart the AI.”
Description by Ko-chan Studio. Written by the developer, not by AppBrain. Click to read.
◆ 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!"
Recent changes:
Optimized CPU AI and decision-making logic.
Fixed a display bug during CPU actions.
Improved game flow and pacing.