# 1 / f Clock vs Kala LED

The clearest difference is in-app purchases: Kala LED at none against 1 / f Clock's 1. 1 / f Clock's advantage is iOS requirement (8.1 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

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

1 / f Clock ships an update every 7 months, Kala LED every 5 months. The most recent releases landed on October 26, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 1 / f Clock | Kala LED |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 months** |
| Size | 47 MB | 18 MB |
| Requires iOS | **8.1** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Y. MOCHIDUKI](https://appshunter.io/developer/556544131) | [思更 卢](https://appshunter.io/developer/1863432850) |

## 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 |


### Kala LED

[App page](https://appshunter.io/ios/app/kala-led/id6756943081)

**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 Kala LED free?

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

### Do 1 / f Clock or Kala LED have ads?

Neither 1 / f Clock nor Kala LED shows ads.

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

1 / f Clock ships an update every 7 months, and Kala LED every 5 months. Most recently, 1 / f Clock was updated on October 26, 2026 and Kala LED on October 17, 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.*