UltraStop

JUHWAN LEE Utilities iPhoneiPadiPod touch

UltraStop is a free Utilities app for iPhone and iPad by JUHWAN LEE. Requires iOS 15.0. Updated January 18, 2026.

Price: Free; on the App Store
Size: 22 MB; Age 4+
Updated: Jan 18; 2026 · v1.0.1

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About UltraStop

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.

What’s new

Version 1.0.1 · Updated January 18, 2026

Bug Fix

App privacy

The developer, JUHWAN LEE, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

App details

UltraStop is a free Utilities app for iPhone, iPad and iPod touch, developed by JUHWAN LEE. It requires iOS 15.0 or later, is 22 MB to download and is available in 8 languages. It was first released on January 22, 2025 and last updated on January 18, 2026.

Category: Utilities
Price: Free
Version: 1.0.1
Size: 22 MB
Requires: iOS 15.0 or later
Compatibility: iPhone, iPad, iPod touch
Languages: English, Hindi, Indonesian, Japanese, Korean, Portuguese, Russian, Vietnamese
Age rating: 4+
Released: January 22, 2025
Last updated: January 18, 2026
Developer: JUHWAN LEE

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Alternatives to UltraStop

Looking for apps like UltraStop? Here are 6 similar apps on the App Store. The highest rated is Multicolor Stopwatch (5.0/5), and all 6 are free to download.

UltraStop vs. alternatives
App	Rating	Price	Last updated	Compare
UltraStop	–	Free	January 18, 2026
NanoStopWatch byNSDev	–	Free	Jul 21, 2025	Compare
Millisecond stopwatch & timer	4.7 / 5 (3)	Free	Aug 7, 2026	Compare
Tick: Precise Countdown	–	Free	Sep 11, 2026	Compare
Animal Health Monitor	–	Free	Jun 23, 2026	Compare
Multicolor Stopwatch	5.0 / 5 (2)	Free	Aug 16, 2026	Compare
StopWatchhh: Lap Timer	–	Free	Jul 17, 2026	Compare

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