The tech team eventually got the app back up and running but Kim still wasn't over how in-demand her emojis had become in only a few hours. "Ahhhhhhhh I still can't believe we broke the entire App Store!!!! #KIMOJI," she tweeted.
Kim also bragged that her app was already number one on the download chart. "WOW!!! Thank you so much everyone who downloaded my new KIMOJI app!" she wrote.
Kimoji costs $1.99 to download, but the Keeping Up With the Kardashians star hasn't received much flack for charging for her emojis. She and her sisters did, however, face criticism earlier this year for enlisting a monthly fee to subscribers of their websites.
"For less than a cup of coffee, fans can get exclusive, original content that they won't get anywhere else about fashion, beauty, health, parenting," Kris Jenner defended her daughters' apps and websites when speaking exclusively to ET. "Each of them has employed teams of editors and videographers to work with them in shooting, curating and creating experiences to share with fans, capturing their passions, unique voices, experiences, lessons and likes."