As her hit mobile game continues to grow, Kim Kardashian West is expanding her mobile app empire today with the debut of new dedicated iOS apps. This new venture is a family affair as well. Her sisters Khloé Kardashian, Kendall Jenner, and Kylie Jenner also announced their individual personal media apps and websites.

Each app aims to give fans a more unique and personal look into each of the sister’s lives. The websites and apps, which will be free to download, offer a mix of free and subscriber content, with a subscription costing $2.99 per month.

The apps were produced by Whalerock Industries, a Los Angeles-based entertainment and media company that creates mobile apps and sites for celebrities. Whalerock’s pitch is that celebrities can become their own media moguls by controlling the types of content they can release, and charge for.

The Kardashian and Jenner apps include personal diaries, live streaming video by the celebrities, beauty tutorials, workout tips, and special access to events and giveaways.

Of course, you can still expect the Kardashian and Jenner sisters to post videos and photos to their massive followings on social sites like Instagram and Snapchat. But it is interesting to see these celebrities taking control of content and stories about their lives, which they had mostly ceded to the media companies, or even social media sites like Instagram.

The Kardashian and Jenner sisters will face the challenge of keeping up the expectations of paid subscribers and continuing to create original content to keep their fans visiting their apps and sites.

This isn’t Kardashian West’s first brush with the mobile app industry. Kardashian’s mobile game, Kim Kardashian: Hollywood, raked in $74 million last year.

If they can make subscribers stick, then the model could become one that many more celebrities start to copy—Whalerock Industries is betting on that.

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