Grok, an AI-powered app developed under Elon Musk's initiatives, has rapidly climbed the ranks on the Apple App Store, reaching the 5th most popular app overall in the United States. It has surpassed Google in overall rankings and holds the number 2 position in the Productivity category across multiple countries including the US, UK, France, and Canada. Despite its growing popularity and high rankings, Grok and the 𝕏 app, which is the number 1 news app in both free and grossing categories on the US App Store, are notably absent from Apple's featured and recommended app lists. In contrast, OpenAI's ChatGPT app is prominently featured across various sections of the App Store, such as "Must-Haves" and "Productivity apps for work and study." Elon Musk has publicly questioned Apple's apparent exclusion of Grok and 𝕏 from prominent placement, suggesting potential bias in favor of ChatGPT. Additionally, development of a Grok Windows app is underway. As of early August 12, 2025, TikTok leads the App Store rankings, followed by Tinder, Duolingo, YouTube, Bumble, with ChatGPT ranked 7th. Industry observers note that Grok's rapid ascent could soon position it as the number 1 app overall.