Comparison

Millisecond Clock vs X Clock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Millisecond precision time display
  • Accurate timekeeping for iPhone and iPad
  • Network delay measurement
  • Video streaming lag analysis
  • Free to download
Features
Read full description

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.

About

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.

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
Read full description

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

Millisecond Clock4 screens
X Clock4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Millisecond Clock versus X Clock: the parameters behind the verdict, then further details
ParameterMillisecond ClockX Clock
PriceFreeFree
Rating4.7 (131 ratings)5.0 (1 ratings) — better
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings131 — better1
Update frequencyEvery 6 monthsEvery 6 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size4 MB41 MB
Age rating4+4+
DeveloperChia-Chun Hsieh晓伟 庄

Customer experience

Millisecond Clock

All ratings131 ratings
Positive93.1%
Neutral2.3%
Negative4.6%
Written reviews12 reviews
Positive75.0%
Neutral16.7%
Negative8.3%

X Clock

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Millisecond Clock

One-time3
  • Remove Ads$0.99
  • Special Offer Package$2.99
  • Unlock Themes$3.99
1 purchases

X Clock

One-time1
  • XClock Permanent Premium$0.99

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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