# Cool Penguin Clock vs 郵便番号さがし

The clearest difference is device support: Cool Penguin Clock at 3 against 郵便番号さがし's 1. Cool Penguin Clock also leads on iOS requirement (12.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Cool Penguin Clock sells 1 one-off in-app purchase and 郵便番号さがし sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Cool Penguin Clock ships an update every 3 weeks, 郵便番号さがし fortnightly. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Cool Penguin Clock | 郵便番号さがし |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 27 MB | 23 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mihoko Araki](https://appshunter.io/developer/1476136915) | [YU KORIKI](https://appshunter.io/developer/6776222963) |

## What reviewers say

### Cool Penguin Clock

[App page](https://appshunter.io/ios/app/cool-penguin-clock/id6453357439)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Penguin Clock with no ads | $1.99 | one-time |


### 郵便番号さがし

[App page](https://appshunter.io/ios/app/japan-postal-code/id6808419083)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を非表示にする | $1.99 | one-time |


## Frequently asked questions

### Is Cool Penguin Clock free?

Cool Penguin Clock is free to download, with in-app purchases available.

### Is 郵便番号さがし free?

郵便番号さがし is free to download, with in-app purchases available.

### Do Cool Penguin Clock or 郵便番号さがし have ads?

Both Cool Penguin Clock and 郵便番号さがし show ads.

### Which is updated more often, Cool Penguin Clock or 郵便番号さがし?

Cool Penguin Clock ships an update every 3 weeks, and 郵便番号さがし fortnightly. Most recently, Cool Penguin Clock was updated on September 30, 2026 and 郵便番号さがし on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*