Abacus Lesson -ADD and SUB-
Abacus Lesson -ADD and SUB- Summary
Abacus Lesson -ADD and SUB- is a ad-supported, with in-app purchases iOS app in Education by Hirokazu Komatsu. Released in Aug 2020 (5 years ago). It has 6.6K ratings with a 4.80★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 13.2K monthly active users and generates around $<10K monthly revenue (43% IAP / 57% ads). Store metadata: updated Jan 16, 2024.
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Store info: Last updated on App Store on Jan 16, 2024 .
4.8★
Ratings: 6.6K
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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.