Perplexity is a free tool that will help you get reliable and timely answers to your questions. It harnesses the power of artificial intelligence from giants like OpenAI and Anthropic, and syncs across different devices. The app offers a "Second Pilot" AI-driven feature to help you find more information on a topic of interest. You can ask questions using text or voice and receive instant answers. The "Continuation of the Topic" feature allows you to continue the discussion for a deeper exploration of the question.