Shiftwhistle is a web and mobile application targeted to permit effective communication between service providers and their loyal very important patrons. It is the evolution of customer service. Service Providers post your work schedule for your Approved Very Important Patrons (VIPs). Post when you are On/Off shift. Build your brand, increase your revenue. Very Important patrons get instant On/Off shift notifications from your favorite service providers. Total privacy. No Patron searches. Get the great service you deserve every time.