Entries are simply anything that you need to track time on (tasks, meetings, events, etc.). Add entries to your week with allocated time to plan, start a timer or add actual time manually for tracking, then compare!
Do I have to set allocated time?
We'd really recommend that you do, as this is how you will let your team know what your week looks like as well as it will help you improve your estimations in the future. However, you can set your default allocation to 0:00 and then use the entries exclusively to track your time.
How do I allocate and track time on a project?
You can attach any entry to a project from the entry menu. The allocated and actual time on that entry will then be counted as part of the designated project. Check out the full details here