# Know Abacus vs Abacus Lesson

The clearest difference is update cadence: Abacus Lesson at every 3 weeks against Know Abacus's every 2 months. Abacus Lesson also leads on ratings volume (837 vs 78). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Know Abacus sells 1 one-off in-app purchase and Abacus Lesson sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Know Abacus against 4.9 for Abacus Lesson. That said, the two scores are not equally well evidenced: Abacus Lesson has 837 ratings behind it against 78, so its average is the more settled of the two. Written reviews are what separate them: 96% of Know Abacus's written reviews are positive against 93% of Abacus Lesson's.

Know Abacus ships an update every 2 months, Abacus Lesson every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Know Abacus | Abacus Lesson |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (78 ratings)](https://appshunter.io/ios/app/know-abacus/id641867438/reviews) | **[4.9 (837 ratings)](https://appshunter.io/ios/app/abacus-lesson-add-and-sub/id1526785916/reviews)** |
| Number of ratings | 78 | **837** |
| Positive reviews | **96.4% of reviews** | 93.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 28 MB | 138 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 Lesson

[App page](https://appshunter.io/ios/app/abacus-lesson-add-and-sub/id1526785916)

Learn addition and subtraction using a virtual abacus, also known as a Soroban. This app helps you develop mental calculation skills, enabling you to perform calculations without physical tools.

**Highlights:** Learn addition, Learn subtraction, Virtual abacus (Soroban), Develop mental calculation skills, Perform calculations without physical tools

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation Lv1 for hiding Ad | $1.99 | one-time |
| Donation Lv2 for hiding Ad | $3.99 | one-time |
| Donation Lv3 for hiding Ad | $8.99 | one-time |

**What reviewers like**

- 👍 Beginner-friendly and easy to use
- 🚀 Quick to learn basic concepts
- 📚 Clear and simple explanations
- 🎯 Effective teaching methodology
- 💰 Free with no ads

**What reviewers complain about**

- 🌐 Poor English translation quality
- 📖 Lessons sometimes hard to read
- ❌ Cannot skip levels
- ⚡ Difficulty progression too steep
- 🐛 App closes accidentally on iPhone when swiping

**Reported bugs**

- Accidental app closure on iPhone during bead swiping
- Error in lesson 3 addition summary
- Sloppy English translation causing confusion
- Lessons difficult to read visually

**Requested features**

- Add Chinese Abacus (Suanpan) option
- Landscape view support
- Level skip functionality
- Better English translation/editing
- Clearer problem presentation with equation format


## Frequently asked questions

### Is Know Abacus free?

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

### Is Abacus Lesson free?

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

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

Abacus Lesson is rated higher. Know Abacus averages 4.8 out of 5 from 78 ratings, while Abacus Lesson averages 4.9 from 837 ratings.

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

Both Know Abacus and Abacus Lesson show ads.

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

Know Abacus ships an update every 2 months, and Abacus Lesson every 3 weeks. Most recently, Know Abacus was updated on November 6, 2026 and Abacus Lesson on November 3, 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.*