# Know Abacus vs Abacus Exercise

The clearest difference is review sentiment: Know Abacus at 96% against Abacus Exercise's 46%. Know Abacus also leads on rating (4.7 vs 4.5). Abacus Exercise's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 2 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Know Abacus sells 1 one-off in-app purchase. Abacus Exercise asks for nothing beyond the download.

Know Abacus holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 67 and 60 respectively. Written reviews point the same way: 96% of Know Abacus's written reviews are positive against 46% of Abacus Exercise's.

Know Abacus ships an update every 2 months, Abacus Exercise every 3 weeks. The most recent releases landed on July 6, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Know Abacus | Abacus Exercise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (67 ratings)](https://appshunter.io/ios/app/know-abacus/id641867438/reviews)** | [4.5 (60 ratings)](https://appshunter.io/ios/app/abacus-exercise/id1523833529/reviews) |
| Number of ratings | **67** | 60 |
| Positive reviews | **96.4% of reviews** | 46.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 28 MB | 90 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kittipong Mungnirun](https://appshunter.io/developer/488058533) | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) |

## What reviewers say

### Know Abacus

[App page](https://appshunter.io/ios/app/know-abacus/id641867438)

This app teaches children how to use an abacus for various math operations. It covers counting, addition, subtraction, multiplication, and division, helping to develop their mathematical abilities and brain potential. It offers multiple learning modes and customization options.

**Highlights:** Abacus counting, Addition and subtraction (1 & 2 digits), Multiplication and division (1-2 digits), Mental math practice, Review and random lessons, Customizable abacus (color, touch), Multiple languages

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Abacus Exercise

[App page](https://appshunter.io/ios/app/abacus-exercise/id1523833529)

Practice abacus calculations with a customizable digital tool. Adjust bead colors, sounds, and layout for a personalized learning experience. Challenge yourself with addition, subtraction, multiplication, and division exercises.

**Highlights:** Customizable abacus layout, Adjustable bead size and position, Up to 15-digit support, Customizable bead colors and sounds, Addition, subtraction, multiplication, division practice, Level-based challenges

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Know Abacus free?

Know Abacus is free to download, with in-app purchases available.

### Is Abacus Exercise free?

Abacus Exercise is free to download, with no in-app purchases.

### Which has better reviews, Know Abacus or Abacus Exercise?

Know Abacus is rated higher. Know Abacus averages 4.7 out of 5 from 67 ratings, while Abacus Exercise averages 4.5 from 60 ratings.

### Do Know Abacus or Abacus Exercise have ads?

Both Know Abacus and Abacus Exercise show ads.

### Which is updated more often, Know Abacus or Abacus Exercise?

Know Abacus ships an update every 2 months, and Abacus Exercise every 3 weeks. Most recently, Know Abacus was updated on July 6, 2026 and Abacus Exercise on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*