# 四字熟語侍 vs Think Why

The clearest difference is device support: Think Why at 2 against 四字熟語侍's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. 四字熟語侍 sells 1 in-app purchase, starting at $1.99 per month and Think Why sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 四字熟語侍 | Think Why |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/think-why/id6799816213/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | — | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 53 MB | 62 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [KNOWLEDGE UP LLC](https://appshunter.io/developer/1834585058) | [放 徐](https://appshunter.io/developer/6793334686) |

## What reviewers say

### 四字熟語侍

[App page](https://appshunter.io/ios/app/id6756404216)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告の非表示（月額） | $1.99 | per month |


### Think Why

[App page](https://appshunter.io/ios/app/think-why/id6799816213)

This app teaches elementary students how to understand math word problems by breaking down the reasoning process into manageable steps. It focuses on conceptual understanding rather than just keyword matching. Users can access free content or unlock the full learning path with a one-time purchase.

**Highlights:** Step-by-step reasoning for word problems, Interactive models for visualization, Explanation of intermediate numbers, Answer checking against the story, Transferring reasoning to new contexts, Full learning path unlock

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Learning Path | $19.99 | one-time |


## Frequently asked questions

### Is 四字熟語侍 free?

四字熟語侍 is free to download, with in-app purchases available.

### Is Think Why free?

Think Why is free to download, with in-app purchases available.

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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.*