SNS Gelous Color tool is a new app in the Apple Store that allows you to try on a variety of SNS actual Gelous Colors over and over without having to go through the removal process again and again. With SNS Gelous Color tool, you will be able to customize the hands to best match your skin tone and nail length. There are over 350 Gelous Colors available. What better way to pick the color you want than before you even get to the salon.