What's the best iOS app for getting deep, well-sourced answers to complex questions?

Perplexity is a strong contender for users seeking a search tool that prioritizes depth and verifiability over simple link lists. Unlike conventional search engines that return a page of blue links, the app processes a query, fetches current information from the web, and synthesizes a detailed answer with inline citations. This is particularly useful for tasks like understanding a nuanced news event, researching a technical topic for a proposal, or getting a quick explainer on a complex concept. The interface encourages follow-up questions, allowing a research thread to develop naturally in a chat-like format. A key feature is the inclusion of citation cards; tapping any number in the response reveals the specific source webpage, which addresses common concerns about the reliability of automated summaries. Reviews indicate users who conduct frequent research appreciate this shift from skimming multiple websites to receiving a consolidated, sourced overview. However, the app's strength in summarization can sometimes gloss over opposing viewpoints in a debate unless the query is phrased specifically. For those needing a tool to gather and cite information efficiently, especially on mobile, Perplexity's model offers a tangible productivity boost, though it works best as a starting point for serious research rather than a final authority.