Kylie Jenner app
Kylie Jenner's new app is currently sitting at number one on the iTunes chartREUTERS/Danny Moloshok

She may be the youngest of the family but Kylie Jenner has proved to be more popular than her older sisters. The 18 year old has topped the iTunes chart with her app, leaving siblings Kim Kardashian, Kendall Jenner and Khloe Kardashian out in the cold.

The famous family launched their brand new websites, and associated apps, on 14 September but it is Kylie who is coming out on top, with TheKylieJenner.com reportedly 74% more popular than her sisters, according to TMZ. Alaxic Smith, CEO of Communly.com, claims 891,340 people downloaded all four apps in just 24 hours.

According to Smith, Kylie is way ahead of her competition with Khloe, 31, in second place with 11% of the popularity, Kim with 9% and Kendall with 6%. Reacting to the news, Kylie told her 35.9m followers on Instagram: "#1 I can't believe it. I love you guys. Can't wait to post more tomorrow." The E! star has already used the website to dispel rumours she has had breast implants, revealing that the trick to her enhanced cleavage is simply a Victoria's Secret bra.

In order to access the four websites, fans must pay a subscription fee of $2.99 (£1.92) with the promise of exclusive content, interviews with the reality stars, beauty tutorials and blogs, while Kylie offers a radio service on her app. Although the app is clearly a hit with fans, others have criticised the teen and her family for making their supporters pay.

One Twitter user commented: "Wait...Kylie's app charges you $3 a month for makeup tutorials that you can find on YouTube for free," while another quipped: "Was going to pay the $2.99 a month for Kylie Jenner's app but then remembered I would like to retain some self dignity."

Suggesting the Keeping Up With The Kardashians star does not need the money due to her existing wealth, one critic noted: "Why the new Kylie Jenner app cost money when she's walking around with 50K on her wrist driving a Ferrari hashtag BYE," while another stated: "Anyone who paid for that Kylie Jenner app has some serious issues."

The reality TV family are no strangers to the app world, with the game Kim Kardashian: Hollywood taking the industry by storm in 2014. Reports claimed the app, which allows the user to live a lavish Hollywood lifestyle, was predicted to earn a staggering annual revenue of $200m with Kim, 34, taking an estimated $28m for herself.

Watch Kylie Jenner address the boob job rumours on her website:

#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