Millisecond Clock vs 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.
Clock+
This bedside clock app features large, easy-to-read digits and simple alarm controls. Customize your experience with various themes and wake-up sounds.
- Large digit display
- Single tap alarm on/off
- Double tap to snooze
- Swipe to dim display
- Customizable themes
- Select wake-up alarm sound
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Large Digit Bedside Clock, a must have! Features: * Single tap to switch alarm on / off * Double tap to snooze alarm for 5 minutes * Swipe up / down to dim the display In-App purchase 'Unlock-All' allows the configuration of different themes / skins with over 100+ variations! Select wake-up alarm sound
Screenshots
Verdict
The clearest difference is ads: Clock+ at none against Millisecond Clock's shown. Clock+ also leads on ratings volume (998 vs 131) and iOS requirement (13.0 vs 15.0). Millisecond Clock's advantage is review sentiment (73% vs 45%) and rating (4.7 vs 4.5). On price, update cadence, in-app purchases and monetization model 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 Clock+ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Millisecond Clock holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Clock+ has 998 ratings behind it against 131, so its average is the more settled of the two. Written reviews point the same way: 73% of Millisecond Clock's written reviews are positive against 45% of Clock+'s.
Millisecond Clock ships an update every 6 months, Clock+ every 4 months. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.
| Parameter | Millisecond Clock | Clock+ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (131 ratings) — better | 4.5 (998 ratings) |
| Positive reviews | 72.7% of reviews — better | 45.1% of reviews |
| Number of ratings | 131 | 998 — better |
| Update frequency | Every 6 months | Every 4 months — 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 — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 15 MB |
| Age rating | 4+ | +4 |
| Developer | Chia-Chun Hsieh | MARK MANSER |
Customer experience
Millisecond Clock
Clock+
Bugs and requests
Millisecond Clock
Not enough reviews yet to summarise bugs or requests.
Clock+
Reported bugs
4 issues- Alarm not working
- Date stuck on wrong day
- Settings not saving
- Inconsistent behavior after updates
Requested features
7 requests- Add weather information
- More alarm sound options
- Add snooze function
- Landscape mode
- Customizable colors and rotation
Show 2 moreShow fewer
- Add HH:MM:SS display
- 24-hour time format
In-app purchases
Millisecond Clock
- Remove Ads$0.99
- Special Offer Package$2.99
- Unlock Themes$3.99
Clock+
- Unlock All$0.99
Questions
Is Millisecond Clock free?
Is Clock+ free?
Which has better reviews, Millisecond Clock or Clock+?
Do Millisecond Clock or Clock+ have ads?
Which is updated more often, Millisecond Clock or Clock+?
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