A powered, personal lifting apparatus, and specifically a lift apparatus, specially adapted for personal use in the entry into and exit from a standard bathtub. The apparatus includes an electric motor powered lifting gantry that slides on a pillar that extends from the floor to ceiling, next to the tub. The gantry raises or lowers an attached chair, or includes a sling. The gantry lowers a user into or out of the bathtub, while rotating automatically to provide for easy entry into or exit from the bathtub, with a locking guide for the gantry that utilizes a square-to round feature of the pillar to allow a 90 degree rotation of the gantry, and then lock it in place as it is lowered.