Set Theory Clock (BerlinClock) vs QuietClock
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.
QuietClock
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Whether on your nightstand, desk, or mounted display, the app stays visible and dims when powered to avoid glare—perfect for passive use. Custom themes and dim delay settings let you shape your ideal timekeeping environment. Digital & Analog clock styles Customizable color themes Auto-dim when device is connected to power Adjustable dim delay and brightness level Private and lightweight - no data tracking Completely free No advertisements
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Set Theory Clock (BerlinClock) | QuietClock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 16.7% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 129 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Neumann | Purpose Solutions Limited |
In-app purchases
Set Theory Clock (BerlinClock)
No in-app purchases
QuietClock
No in-app purchases
Questions
Is Set Theory Clock (BerlinClock) free?
Is QuietClock free?
Do Set Theory Clock (BerlinClock) or QuietClock have ads?
Which is updated more often, Set Theory Clock (BerlinClock) or QuietClock?
Other comparisons
