# Clock Twirling vs KnowClock

The clearest difference is ads: KnowClock at none against Clock Twirling's shown. KnowClock also leads on iOS requirement (16.0 vs 18.6). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Clock Twirling sells 1 one-off in-app purchase and KnowClock sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Clock Twirling ships an update weekly, KnowClock every 11 days. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Clock Twirling | KnowClock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 11 days |
| Size | 4 MB | 8 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [zhenhua qin](https://appshunter.io/developer/457243793) | [中周 王](https://appshunter.io/developer/1611287450) |

## What reviewers say

### Clock Twirling

[App page](https://appshunter.io/ios/app/clock-twirling/id6760804276)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $0.99 | one-time |


### 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 Clock Twirling free?

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

### Is KnowClock free?

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

### Do Clock Twirling or KnowClock have ads?

Clock Twirling shows ads; KnowClock does not.

### Which is updated more often, Clock Twirling or KnowClock?

Clock Twirling ships an update weekly, and KnowClock every 11 days. Most recently, Clock Twirling was updated on October 16, 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.*