A method and system to test, monitor, and share revenue associated with third-party software applications operating on mobile devices over a network operator’s wireless network. The seating pad assembly includes a cushion formed from a viscoelastic foam and having dimensions substantially conforming to the dimensions of at least the hipthigh support and the back support of the seat. Since the signal outputted from the operational amplifier has a frequency corresponding to the angular speed, it is converted into the voltage by a frequency-voltage conversion circuit so as to detect a rotation. The duty-to-voltage amplifier comprises a current source, a switch and a current splitter.