I’m actually planning to add this feature into www.gympro.com soon Saare – it will complement our already existing feature of adding client groups to sessions. If you create a free account you will definitely get an email notification when it’s done and dusted 😉
Im not sure about any apps but I do know that our gym management software (MoSo) clients can sign up for trials, join, book classes and training sessions, pay bills, print usage reports, and update their account at home, on a mobile device, or on a Kiosk in your gym. You can also run referral marketing programs via Facebook and Twitter that help members promote you to their friends in a single update. All integrated directly with your software…and a whole lot more!
If you have any more questions please feel free to message me at [email protected]
Hope this helps!