# Set Theory Clock (BerlinClock) vs Network Speed Tester Server

The clearest difference is price: Set Theory Clock (BerlinClock) at Free against Network Speed Tester Server's $1.99. Network Speed Tester Server's advantage is rating (5.0 vs 3.7) and update cadence (every 8 months vs every 129 months). On ratings volume, ads and in-app purchases there is nothing between them.

Set Theory Clock (BerlinClock) is free to download; Network Speed Tester Server costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Network Speed Tester Server holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews point the same way: 29% of Set Theory Clock (BerlinClock)'s written reviews are positive against 50% of Network Speed Tester Server's.

Set Theory Clock (BerlinClock) ships an update every 129 months, Network Speed Tester Server every 8 months. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Set Theory Clock (BerlinClock) | Network Speed Tester Server |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/set-theory-clock-berlinclock/id972665637/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/network-speed-tester-server/id1235490220/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | 28.6% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 129 months | **Every 8 months** |
| Monetization | **Free** | Paid |
| Size | 2 MB | 2 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Neumann](https://appshunter.io/developer/972665636) | [Lakehorn AG](https://appshunter.io/developer/288286082) |

## 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, Vision Pro support

**In-app purchases:** none


### Network Speed Tester Server

[App page](https://appshunter.io/ios/app/network-speed-tester-server/id1235490220)

This utility app provides the necessary server component for network speed testing. It works in conjunction with a client app to measure WiFi performance throughout your home. Ensure the server device is near your router for accurate results.

**Highlights:** Network speed testing server, Works with iOS and tvOS client apps, Measures WiFi performance, Requires server device near router, Companion macOS app available

**Features:** Vision Pro support

**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 Network Speed Tester Server free?

Network Speed Tester Server costs $1.99, with no in-app purchases.

### Which has better reviews, Set Theory Clock (BerlinClock) or Network Speed Tester Server?

Network Speed Tester Server is rated higher. Set Theory Clock (BerlinClock) averages 3.7 out of 5 from 3 ratings, while Network Speed Tester Server averages 5.0 from 3 ratings.

### Do Set Theory Clock (BerlinClock) or Network Speed Tester Server have ads?

Neither Set Theory Clock (BerlinClock) nor Network Speed Tester Server shows ads.

### Which is updated more often, Set Theory Clock (BerlinClock) or Network Speed Tester Server?

Set Theory Clock (BerlinClock) ships an update every 129 months, and Network Speed Tester Server every 8 months. Most recently, Set Theory Clock (BerlinClock) was updated on November 4, 2026 and Network Speed Tester Server on November 2, 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.*