# 磨叽时钟 vs KnowClock

The clearest difference is in-app purchases: 磨叽时钟 at none against KnowClock's 3. 磨叽时钟 also leads on iOS requirement (6.0 vs 16.0). KnowClock's advantage is update cadence (every 11 days vs every 42 months). On price, ads and device support there is nothing between them.

Both are free to download. KnowClock sells 3 in-app purchases, starting at $0.99 per month. 磨叽时钟 asks for nothing beyond the download.

磨叽时钟 ships an update every 42 months, KnowClock every 11 days. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 磨叽时钟 | KnowClock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 11 days** |
| Size | 37 MB | 8 MB |
| Requires iOS | **6.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Extransit](https://appshunter.io/developer/492614145) | [中周 王](https://appshunter.io/developer/1611287450) |

## What reviewers say

### 磨叽时钟

[App page](https://appshunter.io/ios/app/id767396101)

**Features:** macOS Compatibility

**In-app purchases:** none


### KnowClock

[App page](https://appshunter.io/ios/app/knowclock-kids-clock/id6765656447)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月订阅 | $0.99 | per month |
| 年订阅 | $1.99 | per year |
| 终身解锁 | $2.99 | one-time |


## Frequently asked questions

### Is 磨叽时钟 free?

磨叽时钟 is free to download, with no in-app purchases.

### Is KnowClock free?

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

### Do 磨叽时钟 or KnowClock have ads?

Neither 磨叽时钟 nor KnowClock shows ads.

### Which is updated more often, 磨叽时钟 or KnowClock?

磨叽时钟 ships an update every 42 months, and KnowClock every 11 days. Most recently, 磨叽时钟 was updated on October 8, 2026 and KnowClock on October 9, 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.*