There are two ways to track your hours using Pancake, you can use add your time manually using the Add Time form or you can use the start-stop timer.
When you are viewing your project, click add time and the form will slide into view. As you type out what time you started and finished, Pancake will figure out if they are valid times or not. This ensures that the right amount of time get's tracked.
Simply hit start when you begin your task and when you're done working on that task or taking a break to work on something else, hit stop and Pancake will automatically add your time for you.