Grok, an AI app developed under Elon Musk's initiatives, has rapidly ascended the rankings on multiple AppStore platforms globally. In the United States, Grok reached the 5th position overall and 2nd in the Productivity category, surpassing Google in popularity. Similar rankings were achieved in the UK, France, Canada, Ireland, and Ukraine, where Grok consistently holds the 2nd spot in Productivity. The app has also become the fastest growing AI on both iOS and Android worldwide, leading all AI apps in month-over-month download growth. Grok's user engagement is reflected in over 1.25 million global ratings with an average score of 4.8 out of 5 stars. Despite this growth, there are observations of Apple featuring competing AI apps such as Google’s Gemini (ranked 7th) and Microsoft’s Copilot (ranked 23rd) more prominently, raising questions about potential bias. Additionally, 𝕏, another app associated with Musk, is ranked the #1 News app on the US AppStore, although it appears less prominently featured compared to other news apps like WSJ and Bloomberg. Elon Musk and other commentators have noted Grok's rapid growth and questioned the AppStore’s promotional choices.