# Digital Clock Ultra vs TetraClock

The clearest difference is rating: Digital Clock Ultra at 4.8 against TetraClock's 3.7. Digital Clock Ultra also leads on ads (none vs shown) and monetization model (free vs ad-supported). TetraClock's advantage is update cadence (every 2 days vs every 3 weeks) and iOS requirement (14.0 vs 17.0). On price, ratings volume, 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.

Digital Clock Ultra holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 8 and 3 respectively.

Digital Clock Ultra ships an update every 3 weeks, TetraClock every 2 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Digital Clock Ultra | TetraClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (8 ratings)](https://appshunter.io/ios/app/digital-clock-ultra/id1672768275/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/tetraclock-falling-block/id6504890211/reviews) |
| Number of ratings | **8** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | **Free** | Ad-supported |
| Size | 42 MB | 6 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SeungJun Lee](https://appshunter.io/developer/1435485286) | [Legal Prompt Inc.](https://appshunter.io/developer/1490746932) |

## What reviewers say

### Digital Clock Ultra

[App page](https://appshunter.io/ios/app/digital-clock-ultra/id1672768275)

Customize your device's clock with personalized backgrounds, calendar integration, and a year progress tracker. Enjoy a sleek, easy-to-navigate interface for a unique time-keeping experience.

**Highlights:** Customizable digital clock display, 12/24 hour format, Built-in calendar with date marking, Year progress percentage tracker, Personalized photo backgrounds, Sleek and modern UI

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Digital Clock Ultra free?

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

### Is TetraClock free?

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

### Which has better reviews, Digital Clock Ultra or TetraClock?

Digital Clock Ultra is rated higher. Digital Clock Ultra averages 4.8 out of 5 from 8 ratings, while TetraClock averages 3.7 from 3 ratings.

### Do Digital Clock Ultra or TetraClock have ads?

TetraClock shows ads; Digital Clock Ultra does not.

### Which is updated more often, Digital Clock Ultra or TetraClock?

Digital Clock Ultra ships an update every 3 weeks, and TetraClock every 2 days. Most recently, Digital Clock Ultra was updated on November 3, 2026 and TetraClock on October 30, 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.*