# PlayWithClock vs Knowtopia

The clearest difference is in-app purchases: PlayWithClock at none against Knowtopia's 1. PlayWithClock also leads on update cadence (every 6 weeks vs every 3 months). Knowtopia's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Knowtopia sells 1 one-off in-app purchase. PlayWithClock asks for nothing beyond the download.

PlayWithClock ships an update every 6 weeks, Knowtopia every 3 months. The most recent releases landed on October 4, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | PlayWithClock | Knowtopia |
| --- | --- | --- |
| 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 3 months |
| Monetization | Ad-supported | — |
| Size | 127 MB | 59 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Akiyo Imanaka](https://appshunter.io/developer/978044107) | [Chad Alexander Knowlton](https://appshunter.io/developer/1845256027) |

## 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


### Knowtopia

[App page](https://appshunter.io/ios/app/knowtopia/id6753843222)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knowtopia Full-Access | $0.49 | one-time |


## Frequently asked questions

### Is PlayWithClock free?

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

### Is Knowtopia free?

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

### Do PlayWithClock or Knowtopia have ads?

PlayWithClock shows ads; Knowtopia does not.

### Which is updated more often, PlayWithClock or Knowtopia?

PlayWithClock ships an update every 6 weeks, and Knowtopia every 3 months. Most recently, PlayWithClock was updated on October 4, 2026 and Knowtopia on September 20, 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.*