# Millisecond Clock vs X Clock

The clearest difference is ads: X Clock at none against Millisecond Clock's shown. X Clock also leads on review sentiment (100% vs 75%) and rating (5.0 vs 4.7). Millisecond Clock's advantage is ratings volume (131 vs 1). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Millisecond Clock sells 3 one-off in-app purchases and X Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

X Clock holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Millisecond Clock has 131 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Millisecond Clock's written reviews are positive against 100% of X Clock's.

Millisecond Clock ships an update every 6 months, X Clock every 6 weeks. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Millisecond Clock | X Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (131 ratings)](https://appshunter.io/ios/app/millisecond-clock/id1526615560/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/x-clock-live-in-the-present/id1596562904/reviews)** |
| Number of ratings | **131** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 4 MB | 41 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chia-Chun Hsieh](https://appshunter.io/developer/908221958) | [晓伟 庄](https://appshunter.io/developer/1479798494) |

## What reviewers say

### Millisecond Clock

[App page](https://appshunter.io/ios/app/millisecond-clock/id1526615560)

This app displays the most accurate time available, down to the millisecond. It's useful for measuring network delays or video streaming lag by comparing displayed time differences.

**Highlights:** Millisecond precision time display, Accurate timekeeping for iPhone and iPad, Network delay measurement, Video streaming lag analysis, Free to download

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Special Offer Package | $2.99 | one-time |
| Unlock Themes | $3.99 | one-time |


### X Clock

[App page](https://appshunter.io/ios/app/x-clock-live-in-the-present/id1596562904)

This app offers a minimalist clock display with customizable themes and widgets. It includes features like timers, reminders, and a focus clock to enhance productivity during study or work sessions. Personalize your device with its transparent widget effects.

**Highlights:** 14 colorful themes, Rich widgets with transparent effects, Countdown and reminder functionality, Focus clock for productivity, Multiple widget support, New clock styles and widgets

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| XClock Permanent Premium | $0.99 | one-time |


## Frequently asked questions

### Is Millisecond Clock free?

Millisecond Clock is free to download, with in-app purchases available.

### Is X Clock free?

X Clock is free to download, with in-app purchases available.

### Which has better reviews, Millisecond Clock or X Clock?

X Clock is rated higher. Millisecond Clock averages 4.7 out of 5 from 131 ratings, while X Clock averages 5.0 from 1 ratings.

### Do Millisecond Clock or X Clock have ads?

Millisecond Clock shows ads; X Clock does not.

### Which is updated more often, Millisecond Clock or X Clock?

Millisecond Clock ships an update every 6 months, and X Clock every 6 weeks. Most recently, Millisecond Clock was updated on October 24, 2026 and X Clock on October 10, 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.*