I do in home personal training and sell 12 week packages mostly. People pay every eight sessions (one month), but I have a hard time keeping track. I’m looking for an app or something I can use on my computer that links with my gmail calendar where I input all of my appointments, that would notify me when the designated number of sessions are complete. Sometimes people cancel, travel or something which throws off the payment dates.
http://www.FitSW.com really has helped improve my personal training sessions. My client’s love being able to track their weights and exercises and it makes things a lot easier than using the yellow cards my gym used to use. It is a quick signup, completely free (I tried a few on the list but then they limit features and charge a lot to use the pro version). FitSW.com provides online tools like workout tracking & organizing, goal/body measurement progress tracking (in very nice easy to read graphs), diet plan creation, allows you to provide demo videos for your clients and includes a scheduling system. Its made my job much easier and you can’t beat the fact that it is Free.
I’ve found http://www.gympro.com to be very helpful – it links to iCal and Google calendar, which I use on a daily basis!