Have you tried Wodify?
I have been using the Wodify on my iPhone to book my West London CrossFit classes and I am really enjoying it. It’s simple to use and I especially like the function where I can keep track of my progress online instead of on paper. I made a quick video about using Wodify here if you want quick preview.
It is available free for both Apple and Android devices. If you haven’t checked it out yet, give it a try. It’s nice to be able to book wellness classes and appointments on the go and with ease.