MillisecondTimer vs UltraStop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MillisecondTimer
This app provides highly accurate timing tools, including a countdown timer, stopwatch, and clock, all with millisecond precision. It's designed for precise measurements in workouts, games, and everyday situations, offering background operation and seamless switching between apps.
- Millisecond precision timing
- Countdown timer with custom intervals
- Stopwatch for accurate interval recording
- Real-time millisecond clock display
- Background operation and notifications
- Recent timers for quick reuse
- Customizable 12/24 hour clock format
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Millisecond Timer is an all‑in‑one app that lets you use a countdown timer, stopwatch, and clock with millisecond (0.001 second) precision. Millisecond Stopwatch records your time accurately down to the millisecond, and Millisecond Clock shows the current time with millisecond precision. When you first install the app, a simple tutorial appears automatically so you can learn how it works and start using it right away. Use Millisecond Timer and Millisecond Stopwatch in situations like these - Measuring workout intervals and exercise times that need accurate records (running, marathon training, etc.) - Everyday situations where you need a precise countdown - Events or games that require millisecond‑level countdowns - Timer challenge games with friends, such as “Who can stop closest to 2.785 seconds?” or for fair draws and random picks 【Millisecond Timer】 - Set timers in hours, minutes, seconds, and milliseconds. - Easily increase or decrease the time using the + and − buttons. - Press and hold the + or − button to quickly set the exact time you want. - Instantly reuse your recent timers from the Recent Timers list. - Tap the displayed time to type in a value faster than using buttons. - Get notified when the timer finishes, even if you’re using another app (background) or your device is locked. - If the timer is running and you switch to another app, it will keep counting and resume seamlessly when you return. 【Millisecond Stopwatch】 - Record times one by one with millisecond precision. 【Millisecond Clock】 - See the current time in real time, down to the millisecond. - Choose between 12‑hour and 24‑hour formats in Settings. - Enjoy a clean digital clock design with a digital‑style font. If you find a bug or have a feature request, go to Settings in the app and use “Send Bug Report & feedback” to contact the developer. 【Pro Version】 Pro is available as a monthly or yearly subscription, as well as a lifetime purchase. - Subscriptions are charged to your Apple ID. - You can manage or cancel your subscription at any time in your Apple Account settings. - If you do not cancel at least 24 hours before the next billing date, your subscription may renew automatically. - All subscription terms follow Apple’s App Store policies. • Terms of Use: https://comdori.tistory.com/179 • Privacy Policy: https://comdori.tistory.com/161
UltraStop
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A high-performance stopwatch app designed for tasks requiring ultra-precise time measurement. It measures time down to milliseconds and microseconds with exceptional accuracy, making it perfect for experiments, sports, programming tests, and more. With an intuitive interface, anyone can effortlessly record precise timings.
Screenshots
Verdict
The clearest difference is in-app purchases: UltraStop at none against MillisecondTimer's 3. UltraStop also leads on ads (none vs shown). MillisecondTimer's advantage is update cadence (every 3 weeks vs every 12 months). On price, device support and iOS requirement 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. MillisecondTimer sells 3 in-app purchases, starting at $1.00 per month. UltraStop asks for nothing beyond the download.
MillisecondTimer ships an update every 3 weeks, UltraStop every 12 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.
| Parameter | MillisecondTimer | UltraStop |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 3 weeks — better | Every 12 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | WONJI HA | JUHWAN LEE |
In-app purchases
MillisecondTimer
- MillisecondTimer Pro Month Plan$1.001 Month
- MillisecondTimer Pro Annual Plan$5.991 Year
- MillisecondTimer Pro Lifetime$34.99
UltraStop
No in-app purchases
Questions
Is MillisecondTimer free?
Is UltraStop free?
Do MillisecondTimer or UltraStop have ads?
Which is updated more often, MillisecondTimer or UltraStop?
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