Virtual Fitness Trainer for both strength machines and free body exercises

We are looking to develop a virtual fitness trainer which will not only teach the user how to perform a certain exercise but will keep record of the number of sets and reps performed. The trainer will check the posture of the user while the exercise is performed and will give real time feedback. It will work for exercises performed using strength machines and free body exercises. At anytime the user can see his/her past exercise track record in the mobile application.