Millisecond Clock vs X Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Millisecond Clock
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.
- Millisecond precision time display
- Accurate timekeeping for iPhone and iPad
- Network delay measurement
- Video streaming lag analysis
- Free to download
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Millisecond Clock shows the exact time down to 1/1000 of a second, accurate enough to measure real delay in cameras, video streams, and network connections. Point a camera at the screen and compare it to another display: the difference in milliseconds tells you exactly how much latency you are dealing with. Beyond precision, Millisecond Clock is a clock you can make your own. Every part of it, from color and font to position on screen, is yours to design. DESIGN YOUR CLOCK- 13 built-in color themes, or create unlimited custom themes with the full color picker - 30 fonts, from the classic digital LED look to elegant serif and rounded styles - Adjustable glow and shadow effects for extra depth - Drag the clock, date, and weekday anywhere on screen, and resize each one independently STAY ON TIME, YOUR WAY- 12-hour or 24-hour time, with an optional blinking colon - 9 date formats to match how you write dates - Show or hide the date and day of the week - Toggle the millisecond display on or off BUILT TO STAY ON SCREEN- Keeps your screen awake so the clock is always visible - A true universal app, designed for both iPhone and iPad Millisecond Clock is free to use, supported by ads. A one-time in-app purchase removes ads and unlocks every premium theme, no subscription required.
X Clock
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.
- 14 colorful themes
- Rich widgets with transparent effects
- Countdown and reminder functionality
- Focus clock for productivity
- Multiple widget support
- New clock styles and widgets
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X Clock is a lightweight clock application that displays the time in a concise way and accompanies your study, work and study. - 14 colorful themes, more will be added in the future. - Rich widgets, support transparent effects, can beautify your desktop and create a personalized desktop. - Multiple widgets, support countdown, countdown, reminder, focus clock. Recent Updates: - Two new clock styles and widgets have been added: Cheering Duck and Childlike
Screenshots
Verdict
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.
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. 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.
| Parameter | Millisecond Clock | X Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (131 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 75.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 131 — better | 1 |
| Update frequency | Every 6 months | Every 6 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Chia-Chun Hsieh | 晓伟 庄 |
Customer experience
Millisecond Clock
X Clock
In-app purchases
Millisecond Clock
- Remove Ads$0.99
- Special Offer Package$2.99
- Unlock Themes$3.99
X Clock
- XClock Permanent Premium$0.99
Questions
Is Millisecond Clock free?
Is X Clock free?
Which has better reviews, Millisecond Clock or X Clock?
Do Millisecond Clock or X Clock have ads?
Which is updated more often, Millisecond Clock or X Clock?
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