# 3n or Not vs 理科検定マスター 4000問

The clearest difference is price: 3n or Not at Free against 理科検定マスター 4000問's $9.99. 理科検定マスター 4000問's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

3n or Not is free to download; 理科検定マスター 4000問 costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 3n or Not | 理科検定マスター 4000問 |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/3n-or-not/id913003589/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 95.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | — |
| Monetization | Ad-supported | — |
| Size | 13 MB | 35 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ninicode](https://appshunter.io/developer/647989501) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## What reviewers say

### 3n or Not

[App page](https://appshunter.io/ios/app/3n-or-not/id913003589)

Test your quick thinking with this educational game.  It challenges you to rapidly identify if a given number is divisible by three. Perfect for practicing mental math skills.

**Highlights:** Quick number discrimination, Multiple of 3 identification, Mental math practice, Educational game

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

**In-app purchases:** none


### 理科検定マスター 4000問

[App page](https://appshunter.io/ios/app/4000/id6764075819)

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

**In-app purchases:** none


## Frequently asked questions

### Is 3n or Not free?

3n or Not is free to download, with no in-app purchases.

### Is 理科検定マスター 4000問 free?

理科検定マスター 4000問 costs $9.99, with no in-app purchases.

### Do 3n or Not or 理科検定マスター 4000問 have ads?

3n or Not shows ads; 理科検定マスター 4000問 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.*