Top Clock vs Round Millisecond Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Top Clock
This app provides a floating clock and timer that stays visible above all other applications. It's useful for tasks like online shopping, studying with Pomodoro timers, or cooking with real-time countdowns.
- Floating clock and timer
- Millisecond timing
- Picture-in-picture window
- Adjustable size and position
- Multiple timer types (stopwatch, countdown, Pomodoro)
- Customizable colors
- One-click operation
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Top Clock is a small window floating clock that displays time and countdown on the desktop and any app. use: 1. Online shopping assistant, a small window on the shopping app displays a millisecond clock or an hourly countdown. 2. For online learning, when watching a video, the Pomodoro is displayed floating in a small window for more efficient learning. 3. Cooking timer, while using other software, a small window can view the countdown in real time. Features: 1. Millisecond timing, online shopping is one step faster. 2. A small picture-in-picture window, adjustable in size and position, can be used simultaneously with other software. 3. Various timers, including clock, stopwatch, countdown, interval timer and Pomodoro. 4. Any combination of colors. 5. The operation is simple, just one click.
Round Millisecond Clock
This app offers a precise real-time digital clock with a unique circular interface, displaying both seconds and milliseconds. Customize your view with options for date, day of the week, and 12/24-hour format.
- Millisecond precision display
- Dual circle interface for seconds and milliseconds
- Customizable display (milliseconds, seconds, date, day)
- Multiple date formats
- 12/24 hour support
- Screen always on
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A real-time digital clock app that displays both seconds and milliseconds with precision using a clean, circular dual-ring interface. [Key Features] - Millisecond Clock: Displays the current time with precision by supporting milliseconds. - Dual Circle Design: Display the flow of seconds and milliseconds simultaneously. - Full Customization: Toggle milliseconds, seconds, date, day of week - Multiple Date Formats: US, EU, ISO, and short formats - 12/24H Support: Includes AM/PM indicator [Additional Features] - Landscape & Portrait support - Screen always on - No permissions required
Screenshots
Verdict
The clearest difference is review sentiment: Top Clock at 61% against Round Millisecond Clock's 0%. Top Clock also leads on rating (4.6 vs 1.0) and ratings volume (149 vs 1). Round Millisecond Clock's advantage is monetization model (ad-supported vs free with in-app purchases) and iOS requirement (13.0 vs 15.0). 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.
Top Clock holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Top Clock has 149 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 61% of Top Clock's written reviews are positive against 0% of Round Millisecond Clock's.
Top Clock ships an update every 2 months, Round Millisecond Clock every 4 months. The most recent releases landed on October 14, 2026 and September 25, 2026 respectively.
| Parameter | Top Clock | Round Millisecond Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (149 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 61.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 149 — better | 1 |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Gude Aipu Technology Co., Ltd | Seulki Eom |
Customer experience
Top Clock
Round Millisecond Clock
In-app purchases
Top Clock
No in-app purchases
Round Millisecond Clock
No in-app purchases
Questions
Is Top Clock free?
Is Round Millisecond Clock free?
Which has better reviews, Top Clock or Round Millisecond Clock?
Do Top Clock or Round Millisecond Clock have ads?
Which is updated more often, Top Clock or Round Millisecond Clock?
Other comparisons
