Kylie and Kendall Jenner have launched their own gaming app. The 'Keeping Up with the Kardashians' stars unveiled 'Kendall & Kylie' - which takes fans on adventures through Hollywood - on the App Store and Google Play, and the game is free to play. Similar to their older half-sister Kim Kardashian West's gaming app, 'Kim Kardashian: Hollywood', the two stars' game is an interactive experience where fans can create their own customised characters and interact with the famous family and their friends. Users begin with no friends or job, just an iPhone and a tiny Santa Monica apartment and have to build their contacts list, reputation and embark on adventures throughout California. The sisters are both avid users of social media, and it plays a key role in the game, as each time a player does something of note, they can post a selfie and gain followers within the virtual world's social media feed. As more content is posted, users can unlock exclusive messages from Kendall, 20, and Kylie, 18, and gain likes and followers. The game was developed with Glu Mobile, which also built 'Kim Kardashian Hollywood', as well as apps for Katy Perry, Nicki Minaj, and are reportedly working on one with Taylor Swift.