Few years ago, any mobile internet was considered a luxury. Nowadays, with iPhone, Android and other smartphones everywhere, it is becoming a neccessity. Your website, as well as your appointments scheduling management system, should be accessible from a browser in any modern cellphone.
But not only should be the visitors allowed to read your website – they need to be able to interact with it as well. Add new appointments, cancel or modify their scheduled appointments or contact you through a contact form. This will create better traction, and your customers will come to love this feature when they are in a hurry. Think about it – they will be able to book the appointment with you from anywhere, without calling you.