# TetraClock vs Pixel Clock

The clearest difference is ads: Pixel Clock at none against TetraClock's shown. Pixel Clock also leads on iOS requirement (12.0 vs 14.0). TetraClock's advantage is update cadence (every 2 days vs every 5 days). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TetraClock ships an update every 2 days, Pixel Clock every 5 days. The most recent releases landed on September 17, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | TetraClock | Pixel Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 5 days |
| Size | 6 MB | 58 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Legal Prompt Inc.](https://appshunter.io/developer/1490746932) | [YIMING SHI](https://appshunter.io/developer/1778404172) |

## What reviewers say

### TetraClock

[App page](https://appshunter.io/ios/app/tetraclock-falling-block/id6504890211)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pixel Clock

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TetraClock free?

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

### Is Pixel Clock free?

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

### Do TetraClock or Pixel Clock have ads?

TetraClock shows ads; Pixel Clock does not.

### Which is updated more often, TetraClock or Pixel Clock?

TetraClock ships an update every 2 days, and Pixel Clock every 5 days. Most recently, TetraClock was updated on September 17, 2026 and Pixel Clock on September 23, 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.*