Hi :) I'm almost done with the Beta version of spatherapist.org. It will be a real time reservation management app for Spa Therapists. A key feature is that your clients will have to adapt to your current availability, not theirs. Your clients will have the ability to make reservations based on your availability, instead of wasting time going back and forth with your client on the best time to come in. There are a lot more other features, most are still under development, but the basics are set to allow your clients to make reservations online for you. I'll give the first 40 users free lifetime membership so email me at email@example.com if you're interested. I'll have the beta out by Monday of next week.