Abstract: A hand exerciser that is structured and arranged to strength the various muscle groups of the user's hand and to improve dexterity of the user's fingers and thumb. The hand exerciser comprises a flexible frame formed into an arc-shaped configuration having an outer surface and an inner surface. On the outer surface of the frame is a first platform at one end and a second platform at the opposite end. A resistance member, such as compressible foam, a bag or the like, is removably positioned against the inner surface inside the arc-shaped frame between the two platforms such that when the user presses the platforms between the fingers and thumb, the resistance member resists compression to exercise the hand. Rails and elongated members on the first platform assist with the improving strength and dexterity. Sensor pads, light and/or audio generators and a cell phone support apparatus can be utilized.