Millisecond Clock
Chia-Chun Hsieh Lifestyle iPhoneiPadiPod touch
Millisecond Clock is a free Lifestyle app for iPhone and iPad by Chia-Chun Hsieh. Rated 4.7/5 from 131 ratings. Requires iOS 15.0. Updated September 3, 2026.
- Rating
- 4.7
- 131 ratings
- Price
- Free
- on the App Store
- Size
- 4 MB
- Age 4+
- Updated
- Sep 3
- 2026 · v2.4.0
Screenshots
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
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.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Millisecond Clock | 4.7 / 5 (131 ratings) | Free | September 3, 2026 | |
| ms clock - millisecond clock | 4.2 / 5 (10) | Free | Aug 9, 2026 | Compare |
| bnClock | 3.9 / 5 (35) | Free | Oct 7, 2026 | Compare |
| Digital Clock - Bedside Widget | 4.4 / 5 (1,295) | Free | Sep 14, 2026 | Compare |
| Nightstand Desk Clock & Widget | 3.5 / 5 (4) | Free | Jun 19, 2024 | Compare |
| 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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