AI ChatLab is an AI toolkit app that provides users with access to the latest and most advanced AI chatbots, all in one convenient and ad-free app. It features ChatGPT 3.5, YouChat, Perplexity AI, and Neeva, which is a privacy-focused search engine. It is user-friendly and offers a wide range of features such as language translation, question answering, text generation, and on-demand answers to any questions.