# RationalNumberCalculator vs 楽しい 小学校 4年生 算数(算数ドリル)

The clearest difference is in-app purchases: RationalNumberCalculator at none against 楽しい 小学校 4年生 算数(算数ドリル)'s 1. RationalNumberCalculator also leads on ratings volume (6 vs 1) and iOS requirement (11.0 vs 13.0). 楽しい 小学校 4年生 算数(算数ドリル)'s advantage is update cadence (every 3 months vs every 9 months). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. 楽しい 小学校 4年生 算数(算数ドリル) sells 1 one-off in-app purchase. RationalNumberCalculator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for RationalNumberCalculator against 5.0 for 楽しい 小学校 4年生 算数(算数ドリル). That said, the two scores are not equally well evidenced: RationalNumberCalculator has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 64% of RationalNumberCalculator's written reviews are positive against 69% of 楽しい 小学校 4年生 算数(算数ドリル)'s.

RationalNumberCalculator ships an update every 9 months, 楽しい 小学校 4年生 算数(算数ドリル) every 3 months. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | RationalNumberCalculator | 楽しい 小学校 4年生 算数(算数ドリル) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/rationalnumbercalculator/id998791093/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/4/id1301772774/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | 63.6% of reviews | **69.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Every 3 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 4 MB | 95 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jirou Fukuda](https://appshunter.io/developer/689603483) | [株式会社EIHSOFT](https://appshunter.io/developer/1541782404) |

## What reviewers say

### RationalNumberCalculator

[App page](https://appshunter.io/ios/app/rationalnumbercalculator/id998791093)

Perform calculations with fractions, decimals, and mixed numbers. Supports addition, subtraction, multiplication, and division. Results can be displayed in various formats.

**Highlights:** Fraction arithmetic, Decimal and fraction operations, Four arithmetic operations, Display results as decimal, Display results as improper fraction, Display results as mixed fraction

**Features:** macOS Compatibility

**In-app purchases:** none


### 楽しい 小学校 4年生 算数(算数ドリル)

[App page](https://appshunter.io/ios/app/4/id1301772774)

This app supports 4th-grade math learning based on the Ministry of Education curriculum. It offers easy-to-use practice for specific topics, allowing for focused study during short breaks. Includes explanations for parents and adjustable difficulty levels.

**Highlights:** 4th-grade math curriculum aligned, Topic-specific practice modules, Adjustable difficulty levels, Parental support with explanations, Monthly learning progression guide, Easy-to-use interface

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $3.99 | one-time |


## Frequently asked questions

### Is RationalNumberCalculator free?

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

### Is 楽しい 小学校 4年生 算数(算数ドリル) free?

楽しい 小学校 4年生 算数(算数ドリル) is free to download, with in-app purchases available.

### Which has better reviews, RationalNumberCalculator or 楽しい 小学校 4年生 算数(算数ドリル)?

RationalNumberCalculator and 楽しい 小学校 4年生 算数(算数ドリル) are both rated 5.0 out of 5 on the App Store, from 6 and 1 ratings respectively.

### Do RationalNumberCalculator or 楽しい 小学校 4年生 算数(算数ドリル) have ads?

Both RationalNumberCalculator and 楽しい 小学校 4年生 算数(算数ドリル) show ads.

### Which is updated more often, RationalNumberCalculator or 楽しい 小学校 4年生 算数(算数ドリル)?

RationalNumberCalculator ships an update every 9 months, and 楽しい 小学校 4年生 算数(算数ドリル) every 3 months. Most recently, RationalNumberCalculator was updated on November 4, 2026 and 楽しい 小学校 4年生 算数(算数ドリル) on November 6, 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.*