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 Education by Hirokuma.App. Released in Aug 2020 (5 years ago). It has about 428K+ installs and 7.2K ratings with a 4.73★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 5.4K monthly active users and generates around $<10K monthly revenue (67% IAP / 33% ads). Store metadata: updated Nov 7, 2025, version 3330.
Recent activity: 1.1K installs this week (5.7K over 4 weeks) showing steady growth , and 35 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Mar 10, 2026. The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Mar 12, 2026.
Store info: Last updated on Google Play on Nov 7, 2025 (version 3330).
Abacus Lesson - ADD and SUB - was last scanned for SDKs 2026-03-10. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Google
Kotlin
JetBrains
Firebase
AdMob4.73★
Ratings: 7.2K
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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