Simple intuitive appointment scheduling for service providers. Setster is a full featured online scheduling application in use by thousands of businesses and professionals. Setster’s platform was built on an open API architecture designed for any local marketing company to be able to create accounts for their customers on the fly. Setster’s scheduling API works across all marketing channels. By adding a booking feature inside mobile apps, directories, daily deal, group and promotional coupons, end users are able book directly from featured offerings in real time.