# Set Theory Clock (BerlinClock) vs Inventife

The clearest difference is update cadence: Inventife at every 19 months against Set Theory Clock (BerlinClock)'s every 129 months. Inventife also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price, ads and in-app purchases 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, Inventife every 19 months. Both last shipped on September 9, 2026.

## The numbers

| Metric | Set Theory Clock (BerlinClock) | Inventife |
| --- | --- | --- |
| 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 | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 129 months | **Every 19 months** |
| Monetization | Free | — |
| Size | 2 MB | 10 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Neumann](https://appshunter.io/developer/972665636) | [Looking4Cache UG (haftungsbeschraenkt)](https://appshunter.io/developer/532870489) |

## 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


### Inventife

[App page](https://appshunter.io/ios/app/inventife/id6503298919)

**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 Inventife free?

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

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

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

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

Set Theory Clock (BerlinClock) ships an update every 129 months, and Inventife every 19 months. Most recently, Set Theory Clock (BerlinClock) was updated on September 9, 2026 and Inventife on September 9, 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.*