So what is the difference between cost center and center?

Both are created with the same function (people manager - centers)

Cost center is used to charge and enter employee items "only". For example, sick time, admin time, meetings etc. A center is a physical center where you can assign both employees and clients. You would use this in conjunction with a service code that has only one output, either payroll or claim(s) but never both. For example: You would assign a client to a center (perhaps called DTS Center) and then use a claim only service code to bill their services to a payer. You would assign employees to a center and they could use the clock in function of SpokeChoice to clock in to a center using a laptop or tablet at the front desk.

When you create a cost center check the box that indicates "clock in anywhere". This is a formality and no one will "actually" clock in but satisfies the application when creating just a cost center. Of course if this is an actual center you can decide should you want someone to clock in anywhere (not advisable) or only at the center via a certain IP Address. Note: To determine your IP Address go to google from that device and type "whats my ip address". Enter that address into the center you have created.