# Pixel Clock vs UUPAY Smart

The clearest difference is in-app purchases: UUPAY Smart at none against Pixel Clock's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Pixel Clock sells 2 one-off in-app purchases. UUPAY Smart asks for nothing beyond the download.

Pixel Clock ships an update weekly, UUPAY Smart every 10 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Pixel Clock | UUPAY Smart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Size | 100 MB | 65 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [YIMING SHI](https://appshunter.io/developer/1778404172) | [Universe Action Limited](https://appshunter.io/developer/1575701044) |

## What reviewers say

### Pixel Clock

[App page](https://appshunter.io/ios/app/pixel-clock-grid/id6737881546)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cyber City 1-day Trial | Free | one-time |
| Cyber City – Unlock Forever | $2.99 | one-time |


### UUPAY Smart

[App page](https://appshunter.io/ios/app/uupay-smart-pos/id6752990952)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pixel Clock free?

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

### Is UUPAY Smart free?

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

### Do Pixel Clock or UUPAY Smart have ads?

Neither Pixel Clock nor UUPAY Smart shows ads.

### Which is updated more often, Pixel Clock or UUPAY Smart?

Pixel Clock ships an update weekly, and UUPAY Smart every 10 days. Most recently, Pixel Clock was updated on October 24, 2026 and UUPAY Smart on October 25, 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.*