The Telegram messaging app is no longer in Apple's (AAPL) - Get Report App Store due to "inappropriate content," the company said Thursday. 

"We were alerted by Apple that inappropriate content was made available to our users and both apps were taken off the App Store. Once we have protections in place, we expect the apps to be back on the App Store," Telegram founder Pavel Durov said. 

According to the App Store's guidelines, apps must have a method for filtering objectionable material, a mechanism to report offensive content, an ability to block abusive users from the service, and published contact information. 

"Apps with user-generated content or services that end up being used primarily for pornographic content, objectification of real people (e.g. "hot-or-not" voting), making physical threats, or bullying do not belong on the App Store and may be removed without notice," iOS guidelines add.

Telegram noted that its applications are still available on Google Play and the company's most recent Telegram X has amassed between 100,000 and 500,000 downloads since its launch. 

More of What's Trending on TheStreet: