Stopwatch+'s setting let you specify whether you want to be prompted before clearing recorded times (defaults to no), the colour of the app's Live Tile, and whether to keep the screen on when the app is running (defaults to on - i.e. disabling the lock screen).
Stopwatch+ has been published by Aälejandro Díazs, who also created the Note+ app that we wrote about earlier this year. Both apps are described as "beautifully Modern" in reference to their close following of the Microsoft's design language and the Windows Phone style guide. Apps that do this tend to feel more like part of the platform, are popular with consumers, and, consequently, get noticeably higher review scores in the Windows Phone Store.
Windows Phone Store description:
Stopwatch+ is a simple yet delightful time-keeping app.
With its high reliability, it allows you to keep track of any event, working in the background, under the lock screen, and even if the phone is completely turned off.
Beautifully Modern, from app icon to page transitions, it’s as intuitive as a native application. Optimized for Windows Phone 8, it supports Live Tile, instant launch, instant resume and fast app switching, as well as WXGA and 720p resolutions.
Stopwatch+ is a free download from the Windows Phone Store. It is only available for Windows Phone 8.