OnlyStopWatch is a very simple stopwatch that displays minimum information and offers basic tools to control the timer.
The main window is nothing special, but it's focused especially on the time, showing a chronometer with milliseconds and a few options at the top of the window.
While you can also control the time using predefined keyboard shortcuts, the “Program” drop down menu enables you to show milliseconds, the hour, start the timer at program start and continue or pause the countdown with a single mouse click.
Letting you choose between a stopwatch and countdown, OnlyStopWatch provides no help section, but everything's pretty easy to use, which should make it appropriate for all types of users.
Another good thing about the program is that it's fully portable, which means you can easily copy its files on a USB removable drive and use it on the go, without the need for prior installation.
Plus, it runs on low resources and doesn't seem to slow the operating system at all, regardless if we are talking about Windows XP, Vista or 7. And it doesn't even require administrator privileges to work properly.
Overall, OnlyStopWatch is a decent piece of software, but it still needs a bunch of improvements to cope with today's users' demands.
More configuration options and a much more appealing interface would be great enhancements, but it's still a good thing that it's being delivered as such a lightweight package that's also portable.