# Abacus 2.0

> Digital abacus simulator with playback analysis and customizable display. (iPhone/iPad app by Kenji Yamamoto.)

- Source: https://appshunter.io/ios/app/abacus-20/id993078416 (this page in markdown: same URL + `.md`)
- Developer: [Kenji Yamamoto](https://appshunter.io/developer/914798942)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Rating: 3.70/5 from 6 App Store ratings · 10 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 85 MB
- Languages: American English, French (France), German (Germany), Japanese
- Released: 2015-05-22
- Data updated: 2026-06-18
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/abacus-20/id993078416/reviews.md

## What is Abacus 2.0?

The Future of the Abacus Machine!

- Playback Analysis Function.
You have ability to make playback analysis for on-going or previous series of calculation.
If you are teaching Abacus to students, you don't have to be right next to her/him. You can replay the calculation, once you find your student made mistake.
Start until press the "All Clear" button is the one series. You are able to replay up to 5 series of calculations.

- Pick a Right Digit Size.
You can scale the Frame and pick the right size for your device.
Pick a one that most fit from 10 digits to 27 digits.

- Numeric Number Display Control Function.
You have control to show Numeric Number on the Screen. Toggle it anytime you want.

- It's Silent!!
There is no Noise!!
You can use this Abacus wherever you want.

For customer support, please contact: yamakengames.cs@gmail.com

## Key features

- Playback analysis of calculations
- Adjustable digit size (10-27 digits)
- Numeric display control
- Silent operation
- Multiple calculation series replay

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Ad Free Forever | $16.99 | one-time |


## Recent user reviews (10 of 10)

All indexed reviews: https://appshunter.io/ios/app/abacus-20/id993078416/reviews.md

### 5/5 — EXCELENTE!!

*2026-02-15, version 1.3.1*

Muito bom, dá para escolher o tamanho e até uma opção para mostrar qual o valor que está sendo representado, o que facilita para iniciantes. Esse app é só do soroban, mas não diz que é pra APRENDER, ent nao tem tutorial, mas serve muito para quem acompanha aulas, por exemplo, no youtube e nao tem o soroban

### 1/5 — 缺點

*2024-10-31, version 1.3.1*

如果有定位點會更好

### 1/5 — I don't like it

*2024-10-22, version 1.3.1*

It doesn't even teach you how to use it

### 1/5 — 滿版廣告

*2022-10-14, version 1.3.1*

找不到關閉= =

### 4/5 — Please add more

*2022-02-03, version 1.3.1*

This app is truly amazing and I appreciate it for letting me use abacus anytime anywhere, but the way to divide that I learnt was only applicable on a 2:5 abacus (an abacus with 2 heaven beads and 5 earth beads). Please make this change as well because then what we can do on a 1:4 abacus (the app currently) can still be done while we can also do what can be done with a 2:5 abacus. It would really be appreciable if you would make this modification.

### 4/5 — コンセプトは良いと思いますが

*2021-06-08, version 1.3.1*

どうして定位点がないのでしょうか？
とても使いにくいです。
定位点を表示するかどうかなど選べるようにして欲しいです。
アプリの動きは軽快で良いと思います。

### 1/5 — Terrible

*2021-03-23*

I have an iPhone 8. The app doesn’t open properly, and stalls on a screen with the company logo. I tried to install it twice, and same problem. Had to delete it as it is completely nonfunctional.

### 5/5 — Please add more

*2020-09-14, version 1.3.1*

Hi !Please add a tutorial for how to calculate. I truly hope you read this.

### 5/5 — A useable abacus

*2019-10-19*

Looks.like one I wanted to buy in Tokyo. I already know how to use it. This gives me a useable abacus on my phone.

### 1/5 — そろばん2.0 課金について

*2017-12-25, version 1.1.0*

そろばん2.0を起動したら、宣伝が表示され「今後表示しないようにする」にクリックしたら、いきなり2000円取られた。
非常に悪質です。
返金してもうにはどうしたらいいでしょうか！

## Frequently asked questions about Abacus 2.0

### What is Abacus 2.0?

Abacus 2.0 is a digital simulation of an abacus machine designed for educational purposes. It allows users to perform calculations, analyze them through playback, and customize the display.

### How does the playback analysis feature work in Abacus 2.0?

The playback analysis allows you to review up to 5 series of calculations performed on the abacus. This is useful for identifying mistakes made during a calculation session, especially for teachers instructing students.

### Can I adjust the size of the abacus in Abacus 2.0?

Yes, Abacus 2.0 offers a "Pick a Right Digit Size" function. You can scale the frame and choose from 10 to 27 digits to best fit your device screen.

### Does Abacus 2.0 make noise?

No, Abacus 2.0 is designed to be silent. This feature allows you to use the abacus for learning or practice in any environment without causing noise disturbances.

### What devices is Abacus 2.0 compatible with?

Abacus 2.0 is available for iPhone, iPad, and iPod devices. It was last updated on July 9, 2019, with version 1.3.1.

### What is the age rating for Abacus 2.0?

Abacus 2.0 has an age rating of 4+, making it suitable for young learners and children. The app was released on May 22, 2015.

### Is Abacus 2.0 free to download?

Yes, Abacus 2.0 is free to download and use. The app does contain in-app purchases, but the core functionality is accessible without cost.

### How often is Abacus 2.0 updated?

The latest version of Abacus 2.0 is 1.3.1, which was released on July 9, 2019. The app has not received updates since then.

## Version history (last 5 releases)

### 1.3.1 — 2019-07-09

- Bug fixed that related to interstitial Ad.

### 1.3.0 — 2019-07-03

- Added iPhoneX Screen Configuration Support.
- Game Engine Updated to the Latest Version.

### 1.2.1 — 2018-02-16

** To all users who Purchased "No Advertisement" **
Please "Restore" your purchase history from "Store" menu.
Once your purchase history restored, you will not see advertisement banner again.

- Game Engine Updated to the Latest version.
- Reward Ad Video Support. Now you can watch Ad Video, then earn Ad Free Time for a while.

### 1.1.0 — 2016-11-23

- Feature improved.
- Bug fixed.

### 1.0.0 — 2015-05-21

No release notes.

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## More apps by Kenji Yamamoto

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All apps by Kenji Yamamoto: https://appshunter.io/developer/914798942

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-18.*