What's the best iOS app for getting detailed explanations and assistance with complex topics?

ChatGPT is a highly capable iOS application that serves as a robust tool for obtaining detailed explanations and assistance across a wide array of complex subjects. Developed by OpenAI, the app excels in parsing natural language inputs to provide coherent, context-aware responses that mimic human conversation. This makes it particularly useful for scenarios such as academic research, where users can quickly clarify concepts without sifting through extensive search results, or for professional settings where drafting documents or debugging code requires on-the-fly insights. Specific features like the ability to handle follow-up questions in a threaded dialogue and generate summaries from uploaded documents enhance its practicality. User reviews indicate that many appreciate how it simplifies information retrieval, with one noting it replaces the need to 'filter through hundreds of web pages.' However, it's not infallible; responses can occasionally contain inaccuracies or require verification, as some users mention always considering its answers critically. For everyday curiosity or structured learning, ChatGPT offers a responsive and versatile companion, though its outputs should be treated as a starting point rather than definitive sources.