The progress bar in the Speexx Portal shows you what percentage of 'My exercises' you have completed and how much you still need to do. It also indicates how much you should have completed by this week. This makes it really easy to see if you are ahead or need to catch up in order to reach your goals.
If you want to know how much time you spent studying, this information is available in the top right-hand corner. Click on the '?' next to 'Results' to see your total study time.