# Abacus Lesson vs Kizki

The clearest difference is in-app purchases: Kizki at none against Abacus Lesson's 3. Kizki also leads on ads (none vs shown). Abacus Lesson's advantage is iOS requirement (11.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. Abacus Lesson sells 3 one-off in-app purchases. Kizki asks for nothing beyond the download.

Abacus Lesson ships an update monthly, Kizki every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Abacus Lesson | Kizki |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/abacus-lesson-division/id1593317741/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 132 MB | 31 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) | [Kanji Goto](https://appshunter.io/developer/1799644657) |

## What reviewers say

### Abacus Lesson

[App page](https://appshunter.io/ios/app/abacus-lesson-division/id1593317741)

Learn the simple and fast method of division using an abacus. This app focuses on developing mental calculation skills by leveraging the abacus technique. It's recommended to master addition, subtraction, and multiplication with an abacus first.

**Highlights:** Learn abacus division techniques, Develop mental calculation skills, Focus on Soroban method, Step-by-step division instruction, Builds on addition, subtraction, multiplication

**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 |


### Kizki

[App page](https://appshunter.io/ios/app/kizki/id6755897374)

**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 Kizki free?

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

### Do Abacus Lesson or Kizki have ads?

Abacus Lesson shows ads; Kizki does not.

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

Abacus Lesson ships an update monthly, and Kizki every 3 weeks. Most recently, Abacus Lesson was updated on November 3, 2026 and Kizki on October 30, 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.*