# XX vs Go Clock

The clearest difference is iOS requirement: XX at 13.0 against Go Clock's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. XX sells 5 one-off in-app purchases and Go Clock sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | XX | Go Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 45 MB | 14 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [上海宏弈源软件科技有限公司](https://appshunter.io/developer/1023106956) | [Vincent Grellert](https://appshunter.io/developer/1886984960) |

## What reviewers say

### XX

[App page](https://appshunter.io/ios/app/xx-smarteye/id6744958666)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10个钻石 | $0.99 | one-time |
| 30钻石 | $1.99 | one-time |
| 62个钻石 | $3.99 | one-time |
| 104个钻石 | $6.99 | one-time |
| 210个钻石 | $14.99 | one-time |


### Go Clock

[App page](https://appshunter.io/ios/app/go-clock-byoyomi-timer/id6795444077)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Yearly | $8.99 | per year |
| Byoyomi Timer Pro | $24.99 | one-time |


## Frequently asked questions

### Is XX free?

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

### Is Go Clock free?

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

### Do XX or Go Clock have ads?

Neither XX nor Go Clock shows ads.

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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.*