# TetraClock vs Flip Clock 3D

The clearest difference is rating: Flip Clock 3D at 4.8 against TetraClock's 3.7. Flip Clock 3D also leads on ratings volume (24 vs 3) and iOS requirement (12.0 vs 14.0). TetraClock's advantage is in-app purchases (none vs 1) and update cadence (every 2 days vs weekly). On price, ads and device support there is nothing between them.

Both are free to download. Flip Clock 3D sells 1 one-off in-app purchase. TetraClock asks for nothing beyond the download.

Flip Clock 3D holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Flip Clock 3D has 24 ratings behind it against 3, so its average is the more settled of the two.

TetraClock ships an update every 2 days, Flip Clock 3D weekly. The most recent releases landed on October 22, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | TetraClock | Flip Clock 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/tetraclock-falling-block/id6504890211/reviews) | **[4.8 (24 ratings)](https://appshunter.io/ios/app/flip-clock-3d-study-time/id6670719398/reviews)** |
| Number of ratings | 3 | **24** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 6 MB | 206 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Legal Prompt Inc.](https://appshunter.io/developer/1490746932) | [乃君 黄](https://appshunter.io/developer/1337343608) |

## What reviewers say

### TetraClock

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

This clock app uses falling tetromino blocks to display the time. Customize colors, animations, and display formats. Note that the displayed time may have slight discrepancies due to animation effects.

**Highlights:** Tetromino block time display, Customizable colors and animations, 12/24-hour format, Seconds display toggle, Adjustable falling speed, Background color options

**Features:** macOS Compatibility

**In-app purchases:** none


### Flip Clock 3D

[App page](https://appshunter.io/ios/app/flip-clock-3d-study-time/id6670719398)

Enhance your workspace with a realistic 3D mechanical flip clock. This app helps improve focus and productivity during work or study sessions by providing a clear time display. Customize with various fonts and themes, and utilize the alarm feature when the app is active.

**Highlights:** Vivid 3D mechanical components, Adjustable viewing angles, 12/24 hour mode switching, Multiple font and theme options, Foreground alarm functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all contents | $1.99 | one-time |


## Frequently asked questions

### Is TetraClock free?

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

### Is Flip Clock 3D free?

Flip Clock 3D is free to download, with in-app purchases available.

### Which has better reviews, TetraClock or Flip Clock 3D?

Flip Clock 3D is rated higher. TetraClock averages 3.7 out of 5 from 3 ratings, while Flip Clock 3D averages 4.8 from 24 ratings.

### Do TetraClock or Flip Clock 3D have ads?

Both TetraClock and Flip Clock 3D show ads.

### Which is updated more often, TetraClock or Flip Clock 3D?

TetraClock ships an update every 2 days, and Flip Clock 3D weekly. Most recently, TetraClock was updated on October 22, 2026 and Flip Clock 3D on October 19, 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.*