They've hijacked TV screens, bookstore shelves and New York Fashion Week catwalks, and now, the sisters Kardashian and Jenner have taken over your phones.

Kim and Khloe Kardashian and Kylie and Kendall Jenner each released their own Apple apps on Monday (September 14), and early reports are showing that (no surprise) they're huge hits. According to Fortune, Kylie is dominating her sisters in downloads—she's the No. 1 free app overall. Who could say no to that spray tan-soaked 42-second trailer, after all...

Khloe is the runner-up at No. 2 on the entertainment chart, while Kim and Kendall are 3 and 4, respectively. Further, the ladies are 13, 35 and 43, respectively, in the scope of overall free apps. "Kylie," "Kendall Jenner" and "Kim Kardashian" have also been some of the most-searched keywords this week.

The apps, which serve as more detailed extensions of the sisters' social media profiles, are available to download at no cost — but come with a $3 monthly fee.

The site reports the sisters welcomed feedback and criticism, as long as it stays clean.

"We want to hear from fans, but we want to start changing the way of social media and have it be from all positives," Khloe said at a press event at New York City's Apple Store earlier this week. (she likely wants to hear the ring of a cash register too, as Fortune reported that Kim's existing Kim Kardashian: Hollywood mobile game made $74 million last year.)

Kourtney Kardashian plans to release a similar app later this year, Fortune reports.

Have you downloaded any KardashiApps yet? What are your early thoughts?

See a collection of celebs sans makeup: