1A2B (a game like Mastermind) Android
1A2B (a game like Mastermind) is #29 in Games › Trivia Free on Google Play in Taiwan and charting in 1 of 23 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperYCY Dev
CategoryGames › Trivia
PriceFree
Released
Installs10k+
Rating★ 4.8 (239)
Updated
Content ratingEveryone
Rating
4.8 ★
239 ratings
Measured
Best rank now
#29
Games › Trivia FreeMeasured
1A2B (a game like Mastermind) at a glance
AI summary written from our chart and store data. It can be wrong: check the numbers above.
Deduction Puzzle Minimalist Abstract short sessions Free
#logic #numbers #mastermind #single-player #wear-os #casual
1A2B (a game like Mastermind) on Google Play
App details
App ID
com.gmail.app97204.numbergame
Publisher
YANG, CHENG-YAN
Publisher country
Taiwan
Content rating
Everyone
1A2B (a game like Mastermind) downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Taiwan | Games › TriviaFree | #29 |
| Taiwan | FamilyFree | #138 |
Apps near 1A2B (a game like Mastermind) on the chart
Games › Trivia Free, around #29.
Ratings
Google Play, worldwide.
Rating
4.8 ★
239 ratings
Measured
Ratings
239
Measured
Written reviews
1
Measured
About 1A2B (a game like Mastermind)
1A2B is a game that requires thinking.
"A" means that a certain number you guess is the same as a certain number of the answer, and their position is also the same.
"B" means that a certain number you guess is the same as a certain number of the answer but the position of the number you guess is wrong.
The following content refers to "3, 4 or 5 unique numbers" as "Numbers".
[for Phone and Tablet]
1.User guess (3, 4 or 5 numbers)
2.Machine guess (3, 4 or 5 numbers)
[for Wear OS]
1.User guess (4 numbers)
Before starting the game, the app will randomly generate Numbers.
After the game starts, you need to enter Numbers. When you press Done icon, the app will send back the result (e.g. 1A3B).
Repeat the previous step until you successfully guess the answer.
The more you practice, the faster you will get!
Before the game starts, the app will enter a guessing state.
After the game starts, you need to enter the answer to the question (e.g. 1234) displayed by the app. When you press Done, the app will ask the next question.
Repeat the previous step until the app successfully guesses the answer.
PLEASE NOTE: If there is one wrong answer, the app will not be able to guess successfully, so please think carefully before answering!
Here you can feel the guesswork process in perfect condition!
"A" means that a certain number you guess is the same as a certain number of the answer, and their position is also the same.
"B" means that a certain number you guess is the same as a certain number of the answer but the position of the number you guess is wrong.
The following content refers to "3, 4 or 5 unique numbers" as "Numbers".
[for Phone and Tablet]
1.User guess (3, 4 or 5 numbers)
2.Machine guess (3, 4 or 5 numbers)
[for Wear OS]
1.User guess (4 numbers)
Before starting the game, the app will randomly generate Numbers.
After the game starts, you need to enter Numbers. When you press Done icon, the app will send back the result (e.g. 1A3B).
Repeat the previous step until you successfully guess the answer.
The more you practice, the faster you will get!
Before the game starts, the app will enter a guessing state.
After the game starts, you need to enter the answer to the question (e.g. 1234) displayed by the app. When you press Done, the app will ask the next question.
Repeat the previous step until the app successfully guesses the answer.
PLEASE NOTE: If there is one wrong answer, the app will not be able to guess successfully, so please think carefully before answering!
Here you can feel the guesswork process in perfect condition!
What's new
1.Fix bug