# Clock Challenge vs Nanzoo Clock

The clearest difference is price: Nanzoo Clock at Free against Clock Challenge's $0.99. Nanzoo Clock also leads on update cadence (every 10 days vs every 15 months). Clock Challenge's advantage is in-app purchases (none vs 1) and device support. On iOS requirement there is nothing between them.

Nanzoo Clock is free to download; Clock Challenge costs $0.99 up front. Nanzoo Clock sells 1 one-off in-app purchase. Clock Challenge asks for nothing beyond the download.

Clock Challenge ships an update every 15 months, Nanzoo Clock every 10 days. The most recent releases landed on September 10, 2026 and June 29, 2026 respectively.

## The numbers

| Metric | Clock Challenge | Nanzoo Clock |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 15 months | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 59 MB | 38 MB |
| Requires iOS | 14.2 | **13.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Jariya Tuantranont](https://appshunter.io/developer/404509814) | [Takafumi Sasaki](https://appshunter.io/developer/625986968) |

## What reviewers say

### Clock Challenge

[App page](https://appshunter.io/ios/app/clock-challenge/id597084739)

**Features:** macOS Compatibility

**In-app purchases:** none


### Nanzoo Clock

[App page](https://appshunter.io/ios/app/nanzoo-clock/id625986965)

This educational app teaches children aged 3-7 how to tell time using interactive clock activities. Users can select animal clocks and practice setting and reading time with adjustable difficulty levels.

**Highlights:** Interactive animal clocks, Set the time activity, Read the time activity, Adjustable difficulty levels, Parent gate for purchases, No ads or tracking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Level Unlock | $0.99 | one-time |


## Frequently asked questions

### Is Clock Challenge free?

Clock Challenge costs $0.99, with no in-app purchases.

### Is Nanzoo Clock free?

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

### Which is updated more often, Clock Challenge or Nanzoo Clock?

Clock Challenge ships an update every 15 months, and Nanzoo Clock every 10 days. Most recently, Clock Challenge was updated on September 10, 2026 and Nanzoo Clock on June 29, 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.*