Elon Musk’s AI company, xAI, is testing out a standalone iOS app for its chatbot, Grok, which was available only to X users until now. The app, currently live in multiple countries including the U.S., Australia, and India, can access real-time data from the web and X, and offers generative AI features like rewriting text, summarizing long paragraphs, a little bit of Q&A, and can generate images from text prompts, too. “Grok is an AI-powered assistant designed to be maximally truthful, useful, an...