# 因数分解特訓《初級編》 vs Flash mental calculation

The clearest difference is in-app purchases: 因数分解特訓《初級編》 at none against Flash mental calculation's 1. 因数分解特訓《初級編》 also leads on ads (none vs shown) and iOS requirement (7.1 vs 15.6). Flash mental calculation's advantage is review sentiment (100% vs 92%). On price and device support there is nothing between them.

Both are free to download. Flash mental calculation sells 1 one-off in-app purchase. 因数分解特訓《初級編》 asks for nothing beyond the download.

## The numbers

| Metric | 因数分解特訓《初級編》 | Flash mental calculation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 91.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 11 MB |
| Requires iOS | **7.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SATORU MATSUSHITA](https://appshunter.io/developer/918757672) | [kenji kiuchi](https://appshunter.io/developer/553473005) |

## What reviewers say

### 因数分解特訓《初級編》

[App page](https://appshunter.io/ios/app/id918757673)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flash mental calculation

[App page](https://appshunter.io/ios/app/flash-mental-calculation/id1224937523)

Practice mental arithmetic with this educational app. Review your calculation process, and easily re-challenge mistaken problems from your past logs. Upgrade to save more calculation history.

**Highlights:** Practice flash mental arithmetic, Review calculation process, Rechallenge mistaken problems, Save past calculation logs, Log history saved after purchase

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove AD & All function Release. | $9.99 | one-time |


## Frequently asked questions

### Is 因数分解特訓《初級編》 free?

因数分解特訓《初級編》 is free to download, with no in-app purchases.

### Is Flash mental calculation free?

Flash mental calculation is free to download, with in-app purchases available.

### Do 因数分解特訓《初級編》 or Flash mental calculation have ads?

Flash mental calculation shows ads; 因数分解特訓《初級編》 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.*