I use Freshbooks for some tracking. There is a free membership if you want to check it out. If you do, if you wouldn't mind using my referral link, that'd be great. It's:
https://jebbgraffphotography.freshbooks.com/signup/Freshbooks is very simple. There is a time tracker button that starts a stopwatch basically and logs the time to certain projects if you want it to.
I copied this from their website:
Getting Started With Time Tracking? The
Time Tracking Tab allows your business to manage projects and your staff to maintain their timesheets online.
- You and your staff can log their hours using either a daily, weekly, or monthly view.
- A pop-up timer widget can be used to log hours throughout the day.
- Staff can be assigned to a project, allowing them to log hours on their timesheet.
- Using the timesheet information associated with a project, an invoice can be automatically generated.