# Abacus Lesson vs Cabacus

The clearest difference is price: Abacus Lesson at Free against Cabacus's $7.99. Abacus Lesson also leads on update cadence (every 3 weeks vs every 14 months). Cabacus's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Abacus Lesson is free to download; Cabacus costs $7.99 up front. Abacus Lesson sells 3 one-off in-app purchases. Cabacus asks for nothing beyond the download.

Abacus Lesson ships an update every 3 weeks, Cabacus every 14 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Abacus Lesson | Cabacus |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | **[4.9 (836 ratings)](https://appshunter.io/ios/app/abacus-lesson-add-and-sub/id1526785916/reviews)** | — |
| Number of ratings | **836** | — |
| Positive reviews | 93.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Monetization | Free with in-app purchases | — |
| Size | 138 MB | 28 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) | [Benjamin Tan](https://appshunter.io/developer/1748368453) |

## What reviewers say

### 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


### Cabacus

[App page](https://appshunter.io/ios/app/cabacus/id6503203800)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Abacus Lesson free?

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

### Is Cabacus free?

Cabacus costs $7.99, with no in-app purchases.

### Do Abacus Lesson or Cabacus have ads?

Abacus Lesson shows ads; Cabacus does not.

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

Abacus Lesson ships an update every 3 weeks, and Cabacus every 14 months. Most recently, Abacus Lesson was updated on October 29, 2026 and Cabacus on October 27, 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.*