# RetroClock vs Concentration Clock

The clearest difference is in-app purchases: Concentration Clock at none against RetroClock's 1. Concentration Clock also leads on iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. RetroClock sells 1 one-off in-app purchase. Concentration Clock asks for nothing beyond the download.

## The numbers

| Metric | RetroClock | Concentration Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/retroclock-desktop-time-dial/id6469766069/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 39 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [伟 雷](https://appshunter.io/developer/1347765042) | [Ais Business Mexico S.A. de C.V.](https://appshunter.io/developer/1764495798) |

## What reviewers say

### RetroClock

[App page](https://appshunter.io/ios/app/retroclock-desktop-time-dial/id6469766069)

Display customizable clock panels with various themes like digital, flip, and retro radio styles. Enjoy a selection of natural white noises with free combination playback.

**Highlights:** Digital clock themes, Flip clock styles, Retro radio clock, Natural white noises, Combination playback

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $0.99 | one-time |


### Concentration Clock

[App page](https://appshunter.io/ios/app/concentration-clock/id6740191750)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RetroClock free?

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

### Is Concentration Clock free?

Concentration Clock is free to download, with no in-app purchases.

### Do RetroClock or Concentration Clock have ads?

Both RetroClock and Concentration Clock show ads.

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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.*