# PlayWithClock vs こくご水族館

The clearest difference is in-app purchases: PlayWithClock at none against こくご水族館's 11. PlayWithClock also leads on iOS requirement (14.0 vs 17.0). こくご水族館's advantage is ads (none vs shown) and update cadence (every 10 days vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. こくご水族館 sells 11 in-app purchases, starting at $1.99 per month. PlayWithClock asks for nothing beyond the download.

PlayWithClock ships an update every 6 weeks, こくご水族館 every 10 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PlayWithClock | こくご水族館 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (16 ratings)](https://appshunter.io/ios/app/playwithclock/id557615128/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Ad-supported | — |
| Size | 127 MB | 35 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Akiyo Imanaka](https://appshunter.io/developer/978044107) | [Kosuke Mawatari](https://appshunter.io/developer/1489564137) |

## What reviewers say

### PlayWithClock

[App page](https://appshunter.io/ios/app/playwithclock/id557615128)

An interactive clock application designed to help users learn to tell time. It allows manipulation of clock hands, provides spoken time in English and Japanese, and offers time-telling challenges. Users can even record their own voices for spoken time.

**Highlights:** Manipulate clock hands, Listen to spoken time (English/Japanese), Time-telling challenges, Record custom voice for time, Switch between English and Japanese, Customizable clock parts and colors

**Features:** Vision Pro support

**In-app purchases:** none


### こくご水族館

[App page](https://appshunter.io/ios/app/id6800643489)

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| すべての単元 遊び放題(月額) | $1.99 | per month |
| すべての単元 遊び放題(年額) | $19.99 | per year |
| どこにかいてある?① ぜんぶあそぶ | $0.99 | one-time |
| どこにかいてある?② ぜんぶあそぶ | $0.99 | one-time |
| かせんをさがそう ぜんぶあそぶ | $0.99 | one-time |
| ひらがなさがし ぜんぶあそぶ | $0.99 | one-time |
| ひらがな聞き取り ぜんぶあそぶ | $0.99 | one-time |
| カタカナ聞き取り ぜんぶあそぶ | $0.99 | one-time |
| 1ねんせいの漢字 ぜんぶあそぶ | $0.99 | one-time |
| 2ねんせいの漢字 ぜんぶあそぶ | $0.99 | one-time |
| よみとり① ぜんぶあそぶ | $0.99 | one-time |


## Frequently asked questions

### Is PlayWithClock free?

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

### Is こくご水族館 free?

こくご水族館 is free to download, with in-app purchases available.

### Do PlayWithClock or こくご水族館 have ads?

PlayWithClock shows ads; こくご水族館 does not.

### Which is updated more often, PlayWithClock or こくご水族館?

PlayWithClock ships an update every 6 weeks, and こくご水族館 every 10 days. Most recently, PlayWithClock was updated on November 1, 2026 and こくご水族館 on October 31, 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.*