# Cuckoo vs Cool Penguin Clock

The clearest difference is update cadence: Cool Penguin Clock at every 3 weeks against Cuckoo's every 3 months. Cool Penguin Clock also leads on iOS requirement (12.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Cuckoo ships an update every 3 months, Cool Penguin Clock every 3 weeks. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Cuckoo | Cool Penguin Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (16 ratings)](https://appshunter.io/ios/app/cuckoo/id414022497/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 68.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 27 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Toshihiko Tambo](https://appshunter.io/developer/406777331) | [Mihoko Araki](https://appshunter.io/developer/1476136915) |

## What reviewers say

### Cuckoo

[App page](https://appshunter.io/ios/app/cuckoo/id414022497)

This utility app simulates a cuckoo clock, chiming every hour and half-hour. Users can toggle the cuckoo sound on or off and customize alarm modes. Additional sounds and background images are available for purchase, along with an option to remove ads.

**Highlights:** Hourly and half-hourly cuckoo chimes, Customizable alarm modes, Add-on purchases for sounds and backgrounds, Ad removal option, Toggleable cuckoo sound

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cuckoo Premium Feature | $0.99 | one-time |


### 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 |


## Frequently asked questions

### Is Cuckoo free?

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

### Is Cool Penguin Clock free?

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

### Do Cuckoo or Cool Penguin Clock have ads?

Both Cuckoo and Cool Penguin Clock show ads.

### Which is updated more often, Cuckoo or Cool Penguin Clock?

Cuckoo ships an update every 3 months, and Cool Penguin Clock every 3 weeks. Most recently, Cuckoo was updated on October 9, 2026 and Cool Penguin Clock on September 30, 2026.

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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.*