Apimac Timer is a Mac utility that comes in handy to people who need to easily measure time on their computers. The application comes with built-in stopwatch, alarm clock, and countdown tools which might prove to be of good use to freelancers for calculating the amount of time they spend working on their tasks.
All of its integrated utilities are listed on the main toolbar of the program. You can easily configure their settings according to your needs and use the built-in tools for an unlimited amount of time.
In my testing, the application worked flawlessly. It immediately displayed the log data when needed and didn't slow down my Mac while counting down time.
Only 2 things you need to consider before using this app on your Mac: it doesn't provide you with a solution for sharing the stored information (you can only print or export the stored data to a format that's compatible only with Apimac Timer) and you need to upgrade the app to its Pro version in order to have access to all features. Once you make the purchase, you can configure the app to send emails, run AppleScript files, etc.
To conclude, it's worth giving this program a try if none of the aforementioned aspects mean much to you. The application is easy-to-use, offers you many advantages, and works perfectly.