Set Theory Clock (BerlinClock) vs Network Speed Tester Server
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Set Theory Clock (BerlinClock)
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.
- 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
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The Berlin Clock consists of 24 lamps arranged in 4 rows. The top two rows (red) represent the hours, and the bottom two rows (yellow) represent the minutes. Additionally, a circular yellow lamp at the top flashes every 2 seconds. In the top rows of each color, each lamp represents 5 hours or 5 minutes, respectively, while in the bottom rows, each represents 1 hour or 1 minute. The lamps light up from left to right and from bottom to top. Once a row is full, all lamps turn off and another lamp lights up in the row above it.
Network Speed Tester Server
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.
- Network speed testing server
- Works with iOS and tvOS client apps
- Measures WiFi performance
- Requires server device near router
- Companion macOS app available
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This app provides the server needed for testing with the free Network Speed Tester Client app for iOS and tvOS. Make sure the device running the server app is close to your WiFi router. Then use the client app on any device and move around your house to measure WiFi performance. There is also a combined client/server app available for the macOS platform called Network Speed Tester.
Screenshots
Verdict
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 review sentiment (50% vs 17%). On ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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: 17% 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 October 29, 2026 and October 17, 2026 respectively.
| Parameter | Set Theory Clock (BerlinClock) | Network Speed Tester Server |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 3.7 (3 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 16.7% of reviews | 50.0% of reviews — better |
| Number of ratings | 3 | 3 |
| Update frequency | Every 129 months | Every 8 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPad, iPod, Apple TV — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Neumann | Lakehorn AG |
Customer experience
Set Theory Clock (BerlinClock)
Network Speed Tester Server
In-app purchases
Set Theory Clock (BerlinClock)
No in-app purchases
Network Speed Tester Server
No in-app purchases
Questions
Is Set Theory Clock (BerlinClock) free?
Is Network Speed Tester Server free?
Which has better reviews, Set Theory Clock (BerlinClock) or Network Speed Tester Server?
Do Set Theory Clock (BerlinClock) or Network Speed Tester Server have ads?
Which is updated more often, Set Theory Clock (BerlinClock) or Network Speed Tester Server?
Other comparisons
