Inaccurate input on touch devices relating to the fingertip

The fat-finger problem has emerged to a routine problem when interacting with especially small touch devices. Thereby, the target is smaller than the size of the finger contact area and interactions may result in incorrect input. Developers tried to respond to this and created new interfaces and tools. In this paper, I would like to present four approaches to address the problem. The stylus is a pen with a soft tip, which is used for interacting with touch surfaces. NanoTouch is a 6 centimeter large touch device, which can be controlled from its backside through a semi-transparent screen. Finally, the RidgePad has an integrated fingerprint scanner, which scans the user ID and fingerprints to save the special appearance of the fingerprints in certain finger positions. New technologies are on the rise where touch screen interactions without a touch screen are possible and the fat-finger problem will be a thing of the past.