ecoClock vs Millisecond Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ecoClock
This app offers a suite of essential tools for daily life, including world clocks, alarms, timers, and a stopwatch. It also provides simple utilities like a compass, spirit level, and calculator, with customizable wallpaper options.
- World date and clock display
- Customizable alarms and timers
- Stopwatch with 1/100 sec precision
- Simple utility tools (compass, spirit level, calculator)
- Adjustable screen brightness timer
- Customizable wallpaper
- Battery status display
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It is an application which is helpful by the date and clock display corresponding to world each language, alarm, timer, stopwatch, event list display, the status display of a battery, the simple tool (compass, a spirit level, LED lighting, and calculator) that can be risen immediately, and various functions. It is possible to change wallpaper freely. Basically, operation and a display of a tool -- a single tap or swipe, and setup of a tool -- the double-tap. The function is embedded in various places. Please use it, enjoying yourself. [Date] The world's languages can be displayed in format For more information or simple display can be switched [Clock] Display selection of digital or analog clock is possible. Display switching function AM / PM or 24 hour [Brightness Timer] You can drop to the lowest brightness of the LCD backlight does not perform the specified time input, operations such as search. That suppress the consumption of the battery even if you do not attempt to auto-lock setting screen starting ON / OFF with a single tap, config with a double tap. You can revert to the standard brightness by sensing the shake of the body also. [Auto Lock Timer] You can delay the time you are free to specify automatic locking of the Setting. (Up to 60 minutes) You can reset the lock automatic timer senses the shaking of the body also start setting screen ON / OFF, with a double tap with a single tap. [Wallpaper] You can save a photo as wallpaper on the spot and took photos in the Photo Library. (Please set in the double-tap when you first start because it is not save the wallpaper.) You can hide the tool icon temporarily. (Double-click the center of the screen) [Alarm] You can set alarms for up to three. (Switch by swiping to the right) Alarms can be set only on specified days of the week every week. (Start screen, configured with double tap) Snooze function.(Interval from 5 to 60 minutes) Snooze function will continue until you stop the alarm.(Up to 12 times in the back ground) Three types of alarm sound can be selected, at the same time vibration can be set (only iPhone) [Timer] You can set the timer for up to three. (Switch by swiping to the left) Three types of alarm sound can be selected. (Start screen, configured with double tap) [Stopwatch] Can be measured up to 1/100 sec. Swipe reset the start / stop, right at the single-tap [Display of battery status] Display of battery power remaining, the display during charging is possible. [View schedule] Calendar Schedule of iOS (90 days maximum) will be listed for the specified period from the date or the current time. [Calculator] Undo / redo functionality and memory of up to three Tax rate calculation function (when you first start, please enter the tax rate.) Calculation results can be copied to the clipboard. [Compass](later iPhone3G, and iPad) Switchable (compass pointed north) magnetic north, true north (north exact) Horizontal instrument that can be measured with respect to a variety of device Both instruments can be calibrated compass horizontal. (Measurement function relative data) [Lighting LED] (later iPhone4) LED lighting that can be used immediately launched Lock mode can be switched or switch lights only while you hold it down. Almost features are available free of charge. However, the advertisement indication may not expect an economy in power consumption effect to use a network and local information frequently. Please pay the fee In-App Purchase, if you like this app. You can add many design and hide the ads.
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.
Screenshots
Verdict
The clearest difference is rating: Millisecond Clock at 4.7 against ecoClock's 4.0. Millisecond Clock also leads on ratings volume (131 vs 1) and review sentiment (73% vs 56%). ecoClock's advantage is iOS requirement (8.0 vs 15.0). On price, update cadence, ads and in-app purchases 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. ecoClock sells 3 one-off in-app purchases and Millisecond Clock sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Millisecond Clock holds the better App Store score, 4.7 against 4.0. 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: 56% of ecoClock's written reviews are positive against 73% of Millisecond Clock's.
ecoClock ships an update every 3 months, Millisecond Clock every 6 months. The most recent releases landed on September 24, 2026 and October 1, 2026 respectively.
| Parameter | ecoClock | Millisecond Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.7 (131 ratings) — better |
| Positive reviews | 56.3% of reviews | 72.7% of reviews — better |
| Number of ratings | 1 | 131 — better |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | Yes | Yes |
| 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 | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 29 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Atsuhiko Tanaka | Chia-Chun Hsieh |
Customer experience
ecoClock
Millisecond Clock
In-app purchases
ecoClock
- iPhone version$5.99
- iPad version$8.99
- Full version$11.99
Millisecond Clock
- Remove Ads$0.99
- Special Offer Package$2.99
- Unlock Themes$3.99









