Reality star Kim Kardashian's $1.99 Kimoji app is the top-grossing entertainment app on Apple's App store. Such was the rush to download the iOS app that it stalled the App store for a while on Monday, the day of its launch.

The app gives access to about 250 emojis and designs. The app currently has two stars out of five and was described as a "wild success on debut".

The KIMOJI has a range of emojis, from a picture of her face, chocolate-covered strawberries, a doughnut and a pair of lips.

The app ranks No.11 among overall highest-grossing apps and is in the league of Candy Crush, Spotify, Pandora and King Digital Entertainment's King, according to

The Apple share closed at $107.23 on Nasdaq on Tuesday.  down 0.09% from its previous close.

Emojis are fast gaining popularity after the Oxford Dictionary named emoji as "word of the year".

While the commercial benefits to Kim and App store are not yet known, what is known for sure is that Kim Kardashian, whose net worth was reported at $85 million in July, is a shrewd businesswoman.

Her first business success was when she sold five pairs of Manolo Blahnik shoes on eBay for Rs 12,500 bought for $3,750 ($750 each).

In June 2014, she launched a game, "Kim Kardashian" Hollywood", that generated $74.3 million for Glu Mobile, the maker of the app, reported

The "Keeping Up with the Kardashians" reality show star acknowledges she is a business person, so to speak. "I think that people sometimes see this persona on my TV show," she said at the Commonwealth Club in July.

In February this year, Kim Kardashian and her family signed a four-year deal worth $100 million, translating into $25 million per season of "Keeping Up with the Kardashians," according to a report. The first season of the show was aired in 2007 and has had 10 seasons till now.

Celebs making it rich in the business world are not new, whether in India or elsewhere.

In India, actor Shah Rukh Khan is the most high-profile businessperson, with interests in movie production and distribution, besides T20 cricket, another money spinner in India.

His Red Chillies Entertainment, after being involved in movies in many ways, forayed into distribution with the recently-launched "Dilwale" starring Kajol, Varun Dhawan, and Kriti Sanon, besides himself.

Shah Rukh Khan is the co-owner of Kolkata Knight Riders (KKR), an IPL franchise, besides the Caribbean T20 team, Trinidad & Tobago.