# Set Theory Clock (BerlinClock) vs QuietClock

The clearest difference is update cadence: QuietClock at every 2 months against Set Theory Clock (BerlinClock)'s every 129 months. On price, ads, 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.

Set Theory Clock (BerlinClock) ships an update every 129 months, QuietClock every 2 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Set Theory Clock (BerlinClock) | QuietClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/set-theory-clock-berlinclock/id972665637/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 129 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 2 MB | 1 MB |
| Requires iOS | **17.6** | 18.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Neumann](https://appshunter.io/developer/972665636) | [Purpose Solutions Limited](https://appshunter.io/developer/1110516935) |

## What reviewers say

### Set Theory Clock (BerlinClock)

[App page](https://appshunter.io/ios/app/set-theory-clock-berlinclock/id972665637)

This app displays time using the unique Berlin Clock system, featuring 24 lamps arranged in four rows to represent hours and minutes. It offers a visually distinct way to tell time, with lamps lighting up sequentially to indicate the passing of time.

**Highlights:** 24-lamp display, Hour representation (5-hour and 1-hour lamps), Minute representation (5-minute and 1-minute lamps), Sequential lamp lighting, Unique time visualization

**Features:** macOS Compatibility

**In-app purchases:** none


### QuietClock

[App page](https://appshunter.io/ios/app/quietclock/id6748567862)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Set Theory Clock (BerlinClock) free?

Set Theory Clock (BerlinClock) is free to download, with no in-app purchases.

### Is QuietClock free?

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

### Do Set Theory Clock (BerlinClock) or QuietClock have ads?

Neither Set Theory Clock (BerlinClock) nor QuietClock shows ads.

### Which is updated more often, Set Theory Clock (BerlinClock) or QuietClock?

Set Theory Clock (BerlinClock) ships an update every 129 months, and QuietClock every 2 months. Most recently, Set Theory Clock (BerlinClock) was updated on October 3, 2026 and QuietClock on October 10, 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.*