# 1 / f Clock vs TetraClock

The clearest difference is in-app purchases: TetraClock at none against 1 / f Clock's 1. TetraClock also leads on update cadence (every 2 days vs every 7 months). 1 / f Clock's advantage is ads (none vs shown) and iOS requirement (8.1 vs 14.0). On price and device support there is nothing between them.

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

1 / f Clock ships an update every 7 months, TetraClock every 2 days. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | 1 / f Clock | TetraClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/tetraclock-falling-block/id6504890211/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 days** |
| Monetization | — | Ad-supported |
| Size | 47 MB | 6 MB |
| Requires iOS | **8.1** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Y. MOCHIDUKI](https://appshunter.io/developer/556544131) | [Legal Prompt Inc.](https://appshunter.io/developer/1490746932) |

## What reviewers say

### 1 / f Clock

[App page](https://appshunter.io/ios/app/1-f-clock/id730286100)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### 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 1 / f Clock free?

1 / f Clock is free to download, with in-app purchases available.

### Is TetraClock free?

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

### Do 1 / f Clock or TetraClock have ads?

TetraClock shows ads; 1 / f Clock does not.

### Which is updated more often, 1 / f Clock or TetraClock?

1 / f Clock ships an update every 7 months, and TetraClock every 2 days. Most recently, 1 / f Clock was updated on October 26, 2026 and TetraClock on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*