With just a simple experiment with finger paint and software, the user can check the accuracy of touch screens on smart phones.

MOTO Development Center Labs has proven screen on smartphone that has a better sensor by drawing diagonal lines slowly, if they are straight and smooth, the screen that identifies touches relatively accurate. If the wave following when drawing, the phone does not interact well with the fingers.

Results showed that the iPhone is the device with excellent capacitance sensor , Motorola droid worst (out of four devices tested) and Google also HTC Eris Nexus One as well although not with Apple products.