# どっちが長い？（あそんでまなぶ！シリーズ） vs Number for iPhone

The clearest difference is price: どっちが長い？（あそんでまなぶ！シリーズ） at Free against Number for iPhone's $3.69. どっちが長い？（あそんでまなぶ！シリーズ） also leads on update cadence (every 4 months vs every 9 months). Number for iPhone's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

どっちが長い？（あそんでまなぶ！シリーズ） is free to download; Number for iPhone costs $3.69 up front. どっちが長い？（あそんでまなぶ！シリーズ） sells 2 one-off in-app purchases. Number for iPhone asks for nothing beyond the download.

どっちが長い？（あそんでまなぶ！シリーズ） ships an update every 4 months, Number for iPhone every 9 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | どっちが長い？（あそんでまなぶ！シリーズ） | Number for iPhone |
| --- | --- | --- |
| Price | **Free** | $3.69 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | — | Paid |
| Size | 22 MB | 10 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UNI-TY INC.](https://appshunter.io/developer/433109975) | [HARASHOW Interactive](https://appshunter.io/developer/356148278) |

## What reviewers say

### どっちが長い？（あそんでまなぶ！シリーズ）

[App page](https://appshunter.io/ios/app/id875715480)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $2.99 | one-time |
| 回数制限解除 | $2.99 | one-time |


### Number for iPhone

[App page](https://appshunter.io/ios/app/number-for-iphone/id925997492)

This interactive number book helps young children learn to read, write, and count numbers through tracing and counting illustrations. It offers a simple interface for pre-readers and adjustable features for different learning levels, making it a fun, parent-child educational experience.

**Highlights:** Interactive number tracing, Counting illustrations, Read and write numbers, Adjustable learning features, Parent-child engagement, Simple interface for young children

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is どっちが長い？（あそんでまなぶ！シリーズ） free?

どっちが長い？（あそんでまなぶ！シリーズ） is free to download, with in-app purchases available.

### Is Number for iPhone free?

Number for iPhone costs $3.69, with no in-app purchases.

### Do どっちが長い？（あそんでまなぶ！シリーズ） or Number for iPhone have ads?

どっちが長い？（あそんでまなぶ！シリーズ） shows ads; Number for iPhone does not.

### Which is updated more often, どっちが長い？（あそんでまなぶ！シリーズ） or Number for iPhone?

どっちが長い？（あそんでまなぶ！シリーズ） ships an update every 4 months, and Number for iPhone every 9 months. Most recently, どっちが長い？（あそんでまなぶ！シリーズ） was updated on November 6, 2026 and Number for iPhone on November 1, 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.*