Abacus Lesson - ADD and SUB -
Abacus Lesson - ADD and SUB - Summary
Abacus Lesson - ADD and SUB - is a ad-supported, with in-app purchases Android app in the Education category, developed by Hirokuma.App. First released 5 years ago(Aug 2020), the app has accumulated 415.6K+ total installs and 7K ratings with a 4.82★ (excellent) average rating.
Recent activity: 3.6K installs this week (6.7K over 4 weeks) showing steady growth , and 63 new ratings this week (126 over 4 weeks) with stable momentum. View trends →
Store info: Last updated on Google Play on Nov 7, 2025 .
4.82★
Ratings: 7K
Screenshots
App Description
This is an app that you can learn addition and subtraction using an abacus.
An abacus is named "Soroban" in Japan. Do you know what an abacus is? The abacus is very simple calculator used in China, Japan, Korea and so on. Some people may say "Isn't it an unnecessary tool if you have a calculator such as a smartphone?". Answer would be "No".
The biggest difference between electric calculators and the abacus is whether you need to hold it in your hand when calculating. Because of its simplicity, you will be able to easily use the abacus in your mind.
Imagine that you can use calculations of about 3 digits in your life without physical tools.
This app will give you the skill of calculation.
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