Twitterrific, one of the most iconic third-party Twitter clients, said today that it has removed the iOS and Mac apps from the App Store. Iconfactory, the company that made Twitterrific, said in a blog post that under Elon Musk’s management, the social media network has become “a Twitter that we no longer recognize as trustworthy nor want to work with any longer.”

The app has had a rich association with Twitter. It was one of the first mobile and desktop clients for the platform, and it helped form the word “Tweet”. In fact, Twitterrific was built back in 2007 — even before Twitter made its own iOS app.

Twitterrific’s demise comes after Twitter intentionally started blocking third-party clients last Friday without any explanation. Earlier this week, the TwitterDev account posted that the company had been suspending these apps in breach of “its longstanding API rules.” But it didn’t specify what rules were broken.