# Top Clock vs Round Millisecond Clock

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.

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.

## The numbers

| Metric | Top Clock | Round Millisecond Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (149 ratings)](https://appshunter.io/ios/app/top-clock-floating-clock/id1576662803/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/round-millisecond-clock/id6736579896/reviews) |
| Number of ratings | **149** | 1 |
| Positive reviews | **61.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 4 MB | 34 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Gude Aipu Technology Co., Ltd](https://appshunter.io/developer/1896411340) | [Seulki Eom](https://appshunter.io/developer/1718927408) |

## What reviewers say

### Top Clock

[App page](https://appshunter.io/ios/app/top-clock-floating-clock/id1576662803)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Round Millisecond Clock

[App page](https://appshunter.io/ios/app/round-millisecond-clock/id6736579896)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Top Clock free?

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

### Is Round Millisecond Clock free?

Round Millisecond Clock is free to download, with no in-app purchases.

### Which has better reviews, Top Clock or Round Millisecond Clock?

Top Clock is rated higher. Top Clock averages 4.6 out of 5 from 149 ratings, while Round Millisecond Clock averages 1.0 from 1 ratings.

### Do Top Clock or Round Millisecond Clock have ads?

Both Top Clock and Round Millisecond Clock show ads.

### Which is updated more often, Top Clock or Round Millisecond Clock?

Top Clock ships an update every 2 months, and Round Millisecond Clock every 4 months. Most recently, Top Clock was updated on October 14, 2026 and Round Millisecond Clock on September 25, 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.*