The AI tool is called "GPT-4 AI Chat Assist Widget" and it is a chatbot powered by advanced artificial intelligence (AI). It can understand and respond to a wide range of questions, compose emails and essays, and even play games. The app offers features such as personalization, multiple chatbot personalities, and support for multiple languages. It uses natural language processing (NLP), machine learning (ML), deep learning (DL), and natural language understanding (NLU) to provide an engaging and intelligent chat experience. Users can download the app from the Google Play store.