Abacus Lesson -ADD and SUB-

Developer: Hirokazu Komatsu

Category: Education

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~49.5K - 99K

990 ratings

~16.7K (installs week)

~16.7K (installs month)

Abacus Lesson -ADD and SUB- Summary

Abacus Lesson -ADD and SUB- is a with in-app purchases iOS app in the Education category, developed by Hirokazu Komatsu. First released 5 years ago(Aug 2020), the app has 990 ratings with a 4.87★ (excellent) average rating.

Recent activity: 334 new ratings this week (334 over 4 weeks) with strong momentum. View trends →

Store info: Last updated on App Store on Jan 16, 2024 .

SDKs, Trackers & Permissions

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App Details

Store ID: 1526785916

First Released: 2020-08-09

Store Last Updated: 2024-01-16

In-App Purchases: Yes

Ads: No

Website: hirokuma.blog

App Store

Crawl Status: Success

Store First Crawled: 2025-03-06

Store Last Crawled: 2026-01-23

Ads & App-Ads.txt

Ads.txt Last Crawled: 2025-10-19

Ads.txt Crawl Status: Success

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The download and scan process is automated but can require manual troubleshooting. Feel free to reach out if your request does not complete in 24hrs or if you have any questions.

4.87★

Ratings: 990

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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.