App profile & analytics · Education · Data updated 2026-10-05

ChallengeAddition&Subtraction

by koichi kodama · Free · Version 1.1

Availability On the App Store since March 2023 ↗

ChallengeAddition&Subtraction is made and published by koichi kodama. AppBrain is an independent app data site and isn't affiliated with koichi kodama. The app name, icon, screenshots and description belong to koichi kodama and are shown as published on the App Store.

About ChallengeAddition&Subtraction

ChallengeAddition&Subtraction is an education app developed by koichi kodama.

What is the rating of ChallengeAddition&Subtraction?

ChallengeAddition&Subtraction has no ratings yet.

Is ChallengeAddition&Subtraction free?

ChallengeAddition&Subtraction is free. The app size is 58.23 MB. The latest version available is 1.1. The last update was on April 9, 2023.

What are the requirements for ChallengeAddition&Subtraction?

The app has a content rating of Everyone. The app has been available on the App Store since March 2023.

Description by koichi kodama (from the App Store)

This app is an educational app that allows you to practice addition and subtraction. A wide range of problems from easy to difficult are available, so you can learn at your own level. There are also features for accuracy rate, time, and score, where the score is calculated based on the time and the number of correct answers. By displaying a rank (from G to S) based on the score, it can increase your motivation to learn. If you want to improve your calculation skills, please try this app!
In order to support localization, if the OS language of the device is not Japanese, it will be displayed in English.

このアプリは、足し算と引き算の練習をすることができる教育アプリです。簡単な問題から難しい問題まで、幅広いレベルの問題が用意されており自分のレベルに合わせて学習することができます。また、正解率やタイム、スコアの機能があり、問題を解くのにかかった時間や正解数に基づいて、スコアが計算されます。スコアに基づいたランク（GからS）が表示されことで学習意欲を高めることができます。計算力を伸ばしたい方、是非このアプリをお試し下さい！
ローカライズ対応として端末のOS言語が日本語以外の場合は英語で表示されます。

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More data about ChallengeAddition&Subtraction

Price	Free
Rating	No ratings
Ranking	Not ranked
Version	1.1
App size	58.2 MB
Suitable for	Everyone

Screenshots

Screenshots by koichi kodama, from the the App Store listing

Official page on the App Store

Alternatives to ChallengeAddition&Subtraction

Changelog of ChallengeAddition&Subtraction

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Developer information for koichi kodama

koichi kodama

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