KoAbacus - 주판, 주산, 암산

Name: KoAbacus - 주판, 주산, 암산
Rating: 2.5 (263 reviews)
Author: aboard

By: aboard

Abacus , Korean Abacus & Mental Arithmetic

Features & Capabilities

KoAbacus brings the centuries-old abacus tradition to your browser, helping learners and practitioners of 주판 (Korean abacus) and mental arithmetic improve speed and accuracy. The extension simulates abacus operations and supports the four basic arithmetic functions while offering automated number generation for practice. It’s ideal for students, tutors, merchants, and brain-training enthusiasts who want hands-on practice with abacus techniques.

Key features include dedicated button functions for positional numbers and arithmetic (+, -, ×, ÷), bounds controls, result/stat display, and convenient long-press actions: Start long-press clears the abacus, Menu long-press adjusts volume (Android 4.0+), and long-press on [-], [×], [÷] triggers auto mental arithmetic. Additional options include Auto Test (count & delay), Speech (start, end, operators), and Click Sound for tactile feedback — all designed to make abacus practice efficient and engaging.

User Growth & Download Statistics

App Education Games

By:

aboard

Downloads:

134,852 4

Rating:

2.50

(263)

Version:

1.0 Last updated: 2025-09-14

Version code:

Creation date:

2012-10-22

Publisher country:

Permissions:

android.permission.GET_TASKS Moderate risk
com.google.android.gms.permission.AD_ID Moderate risk
android.permission.ACCESS_WIFI_STATE Low risk
android.permission.INTERNET Low risk
android.permission.WAKE_LOCK Low risk
android.permission.ACCESS_NETWORK_STATE Safe

Size:

1.13MB

Email:

op*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-07-13

Compare stats and ranking:

Ranking

# 188,215 ▼ 1,311

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

aboard

Google Play Store

https://play.google.com/store/apps/details?id=aboard.and.koabacus

Email:

op*****@gmail.com

Website:

https://opandor.blogspot.com

User Reviews

Users appreciate the app for enhancing mental arithmetic and supporting UCMAS and abacus learning. Many find it effective for practicing addition and subtraction, leading to improved skills. However, common complaints include a confusing interface with unclear instructions, especially for beginners and children, and some technical issues like display problems. The app's subtraction functionality also has limitations, reducing its usefulness in that area.

Pros

Helps improve mental arithmetic skills, particularly addition and subtraction.
Useful for students practicing UCMAS or abacus methods.
Encourages mental power and math learning.
Users find it good and helpful for learning math.
Some users report becoming more expert in abacus after use.

Cons

Interface is confusing, especially the upper part of the screen, making it hard to understand how to use the app initially.
Some calculation features like continuous subtraction start from zero, which users find less useful.
Lack of clear instructions or guidance makes it difficult for beginners and children to learn.
Display issues reported by users.