OpenAI has launched a ChatGPT iPhone app, as announced by the company's CTO, Mira Murati, on Twitter. This marks the first time OpenAI has released an app directly on the Apple ($AAPL@US) App Store. The app, the first official mobile application for ChatGPT, aims to cater to the growing demand for next-generation artificial intelligence applications. ChatGPT gained significant popularity, attracting over 100 million users since its launch last year. ChatGPT utilizes large language models, and machine-learning applications trained on vast amounts of data to generate human-like responses, including long paragraphs and code.