Four new apps were unleashed on the world this week, courtesy of the world's most powerful family.

The Kardashian-Jenner sisters gathered at the Apple Store in New York on Monday to launch their new paid websites/apps, each containing tailored original video content.

Kylie, Kim, Kendall and Khloé are all on board, with Kourtney's app apparently in production at the moment too. But while the girls seemed on equal footing to start with, hours later it was evident that Kylie's release had destroyed all the others in terms of user numbers.

The reality star celebrated her Apple Store Number 1 status via Instagram earlier in the week, but new figures show just how big a lead she has gained on her sisters.

According to TMZ, a whopping 75% of subscribers were for Kylie's app only, with her sisters' subscribers accounting for just 25% of sign-ups.

 

#1 I can't believe it. I love you guys. Can't wait to post more tomorrow

A photo posted by King Kylie (@kyliejenner) on

Kylie gained around 670,000 new users in her first 24 hours alone, with Khloé coming in second with around 98k, then Kim with 80k and Kendall pulling up the rear with 53k.

No doubt using tabloid speculation as her inspiration, Kylie's first video showed how she had managed to achieve bigger boobs… WITHOUT a boob job (apparently).

 

watch my little trick on my app/website. Click the link In my bio or thekyliejenner.com

A photo posted by King Kylie (@kyliejenner) on

Yesterday's content focused on the reality star's 18th birthday celebrations, which saw her party in LA, Mexico and Montreal and scooping over half a million euro worth of gifts, including a €300,000 Ferrari from her boyfriend Tyga.

As for Khloe, her content so far has been a little more sophisticated, focusing on fashion, fitness and even some home decor – namely the legendary stacked biscuit jars that KUWTK fans will recognise from her home.

Kim's site offers an inside look at being the most glamourous mum around, from personal Met Gala Polaroids to monthly pregnancy diaries.

While most of the content was kept under wraps until launch day, Kim had teased a number of make-up tutorials with her BFF Mario Dedivanovic, all of which are set to appear on the site too.

As for Kendall, she has aimed for more minimalist feel with her site, offering behind-the-scenes NYFW snaps as well as lots of high-fashion posts.

So there you have it – boobs, biscuits, babies and boots… it's been a busy week for these four sisters.