# Abacus Lesson vs Unit Sharp

The clearest difference is in-app purchases: Unit Sharp at none against Abacus Lesson's 3. Unit Sharp also leads on ads (none vs shown). Abacus Lesson's advantage is iOS requirement (11.0 vs 26.4). On price and device support there is nothing between them.

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

## The numbers

| Metric | Abacus Lesson | Unit Sharp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (14 ratings)](https://appshunter.io/ios/app/abacus-lesson-multiplication/id1582635868/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 138 MB | 5 MB |
| Requires iOS | **11.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) | [Kyle Scheer](https://appshunter.io/developer/1840618676) |

## What reviewers say

### Abacus Lesson

[App page](https://appshunter.io/ios/app/abacus-lesson-multiplication/id1582635868)

Learn multiplication using a virtual abacus. This app teaches a simple and fast method for calculating multiplication, emphasizing the mental calculation benefits of the abacus over digital calculators.

**Highlights:** Virtual abacus for multiplication, Simple and fast calculation methods, Focus on mental calculation skills, Step-by-step multiplication lessons, Suitable for beginners

**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 |


### Unit Sharp

[App page](https://appshunter.io/ios/app/unit-sharp-conversion-trainer/id6766017818)

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

**In-app purchases:** none


## Frequently asked questions

### Is Abacus Lesson free?

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

### Is Unit Sharp free?

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

### Do Abacus Lesson or Unit Sharp have ads?

Abacus Lesson shows ads; Unit Sharp does not.

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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.*