A mechanical lift seat for use with transportation assistance devices and/or on any stationary horizontal surface is disclosed. The mechanical lift seat is designed for assisting a person into a seated position or into a standing position. The mechanical lift 5 seat includes an upper shell and a lower shell that are hingeably coupled using a hinge. The opening and closing of the upper shell and the lower shell is controlled, for example, using a pneumatic piston or a spring device. Further, the mechanical lift seat can include fastening devices for engaging with the horizontal rails or bars of transportation assistance devices, such as wheelchairs, transport chairs, companion chairs, walkers, and 10 the like.
