Kim Kardashian watch out, your little sister Kylie Jenner is coming for your crown! Kim Kardashian is a social media queen but it looks like her youngest sister Kylie who just turned 18, will be taking over her spot very soon. Monday (Sept 14th) , the sisters Kim, Khloe and Kylie launched their very own personalized apps. As expected each of the apps did huge numbers but Kylie’s app soared to the top of the Free Apps chart. Read more below.