If youmicrosoft.com/detail/9nz12v47dnjh">Startwatch : An ad-free, precision-focused app that tracks time down to the millisecond. It is unique because it continues recording even if your device is powered off or the app is closed.

It supports lap and split times, a full-screen "Expand" mode for better visibility, and stays active even if you minimize the window. 2. Top-Rated Stopwatch Apps from the Microsoft Store

For advanced professional use, you might prefer standalone desktop software that doesn't rely on the Microsoft Store:

Press the Windows Key , type "Clock" (or "Alarms & Clock"), and select the app.