# Cuckoo vs ITOS Self3

The clearest difference is in-app purchases: ITOS Self3 at none against Cuckoo's 1. ITOS Self3 also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Cuckoo sells 1 one-off in-app purchase. ITOS Self3 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Cuckoo | ITOS Self3 |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 15 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Toshihiko Tambo](https://appshunter.io/developer/406777331) | [ITOS Inc](https://appshunter.io/developer/931339182) |

## 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 |


### ITOS Self3

[App page](https://appshunter.io/ios/app/itos-self3/id1163101659)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cuckoo free?

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

### Is ITOS Self3 free?

ITOS Self3 is free to download, with no in-app purchases.

### Do Cuckoo or ITOS Self3 have ads?

Cuckoo shows ads; ITOS Self3 does not.

### Which is updated more often, Cuckoo or ITOS Self3?

Cuckoo ships an update every 3 months, and ITOS Self3 every 3 months. Most recently, Cuckoo was updated on November 6, 2026 and ITOS Self3 on November 6, 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.*