Workforce for ArcGIS is included, when you subscribe to ArcGIS Online.
Together with other apps for ArcGIS, Workforce for ArcGIS will help you assign orders to your Mobile Workforce or Field Workers and share status of your tasks throughout your organization.
Rapidis offers an Add-on App, Workforce Planner, that combines the strengths from Workforce for ArcGIS with those of Rapidis Logistics Planner. As a result, functionalities for automatic scheduling and optimized route planning are added.
On a practical level, this means that Dispatchers can select tasks from their pool together with any number of field workers. After a few moments, the dispatcher will see the an optimized schedule for each worker and be sure that he has the most efficient plan for his entire fleet of workers.