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Screenshots

  • Millisecond Clock screenshot 1
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  • Millisecond Clock screenshot 3
  • Millisecond Clock screenshot 4

About Millisecond Clock

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.

Ratings & reviews

4.7

131 ratings

5 ★ 82% 4 ★ 11% 3 ★ 2% 2 ★ 2% 1 ★ 3%

What’s new

Version 2.4.0 · Updated September 3, 2026

- Resizing the time, date, and weekday on the main screen now works correctly, and your adjustments are saved. - "Reset Settings" no longer removes your purchases. Remove Ads and Unlock Themes stay active after a reset. - Color picker: the red, green, and blue sliders now respond reliably, and adjusting one channel no longer moves the others. Short hex codes (such as #FFF) are now supported. - The preview clock in Settings now follows your 12- or 24-hour preference and correctly shows 12 (instead of 00) at noon and midnight. - Fixed a case where the loading indicator could stay on screen after a purchase or restore didn't finish; purchases and restores are now more reliable. - General stability improvements and fixes for several rare crashes.

App privacy

The developer, Chia-Chun Hsieh, reported these privacy practices to Apple.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers: Device ID

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Identifiers: Device ID
  • Diagnostics: Crash Data

Used for: Third-Party Advertising, App Functionality

Alternatives to Millisecond Clock

Looking for apps like Millisecond Clock? Here are 6 similar apps on the App Store. The highest rated is Flip Clock - Focus Timer (4.7/5), and all 6 are free to download.

Millisecond Clock vs. alternatives
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Millisecond Clock 4.7 / 5 (131 ratings) Free September 3, 2026
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Flip Clock - Focus Timer 4.7 / 5 (22) Free Sep 1, 2025 Compare
Clock+ :Digital Clock & Alarm 4.5 / 5 (1,028) Free Mar 22, 2025 Compare

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