MarvinTennis

MarvinTennis is a 'transactional calendar' app.

This app keeps track of Tennis Lessons and Clinics with coach Marvin.

Students purchase 'credits' from the coach directly and he adds those credits to their account in the app.

The student can then use those credits in the app to schedule Lesson and Clinic events. Students can also cancel events. Upon coach approval, the credits are then refunded to the student.