# 集中852 vs すばやく！40hz再生集中

The clearest difference is in-app purchases: 集中852 at none against すばやく！40hz再生集中's 1. 集中852 also leads on ads (none vs shown). すばやく！40hz再生集中's advantage is iOS requirement (13.0 vs 18.5). On price and device support there is nothing between them.

Both are free to download. すばやく！40hz再生集中 sells 1 in-app purchase, starting at $1.99 per month. 集中852 asks for nothing beyond the download.

## The numbers

| Metric | 集中852 | すばやく！40hz再生集中 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Size | 1 MB | 72 MB |
| Requires iOS | 18.5 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ryota Koda](https://appshunter.io/developer/1834053321) | [TORU YAMAKAWA](https://appshunter.io/developer/1847331833) |

## What reviewers say

### 集中852

[App page](https://appshunter.io/ios/app/852/id6751219410)

**Features:** macOS Compatibility

**In-app purchases:** none


### すばやく！40hz再生集中

[App page](https://appshunter.io/ios/app/40hz/id6767221053)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | per month |


## Frequently asked questions

### Is 集中852 free?

集中852 is free to download, with no in-app purchases.

### Is すばやく！40hz再生集中 free?

すばやく！40hz再生集中 is free to download, with in-app purchases available.

### Do 集中852 or すばやく！40hz再生集中 have ads?

すばやく！40hz再生集中 shows ads; 集中852 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.*