The core download. With this you get free unlimited time use of Timesmith. There are limitations on number of elements (5), activities (5) etc as will as number of observations per study (40) and sample (200) with with some restriction on functions such as joining split observations and stacking studies.
Many freelance engineers and organisations should find this configuration covers their needs, long term.
Where more intense and longer work is normal, Principal provides full use of facilities including unlimited observations, elements, subjects, activities, stacking and joining observations. Useful for department manager, busy contractor or project manager.
Project gives holders of the free version (Practitioner) a time limited (56 days) upgrade path to the full version. Particularly useful for provisionally increasing a team size and letting a project to be realistically costed for software acquisition within accounting periods.