How the Perplexity AI Mobile App Works?

Synced Across All Your Devices

Users experience hassle-free transitions between platforms because search history and preferences automatically synchronise across all connected devices. If you start a research thread on your laptop and need to continue on your phone during a commute, the thread is exactly where you left it in the mobile app. The sync works in both directions, so anything you research on mobile appears in your desktop history as well.

This cross-device continuity is especially practical for Deep Research sessions. You can submit a Deep Research query on mobile, lock your phone while the session runs in the background, and pick up the completed report later on desktop or continue reviewing it on mobile. The session does not require you to stay on screen while it processes.

Voice Search and Hands-Free Research

Voice input is one of the features that the mobile app handles distinctly better than desktop. Hold the microphone button in the search bar, speak your question in natural language, and Perplexity processes it identically to a typed query, with the same real-time web search, the same cited answer, and the same follow-up capability. Voice is particularly useful for longer, conversational questions where typing would be slow, for quick factual lookups while your hands are occupied, and for accessibility reasons where voice input is preferable to typing.

On Comet for iOS, voice mode is embedded directly into the browser. Voice mode works across the tabs you have open, so you can ask about what you are reading at the moment without switching apps or breaking your workflow. You can ask for a summary of an article you are currently reading, request additional context on a topic you found, or have Comet research a related question, all by speaking without leaving the page.

The Discover Feed and Library

The Discover section on the mobile app surfaces trending topics, curated research from the Perplexity community, and popular threads that other users have found valuable. This is not personalised advertising. It is a content discovery layer that can introduce you to topics, tools, and research threads you would not have searched for independently.

The Library stores everything you have searched for, organised beyond simple chronological history. It curates your discoveries so you can find a thread from three weeks ago without scrolling through everything you have searched since. Combined with Spaces, the Library gives you two levels of research organisation: project-level in Spaces, and discovery-level in the Library.

How to Set Up and Use the Perplexity AI Mobile App: Step-by-Step Guide

Step 1: Download the App and Create Your Account

Search for “Perplexity AI” in the Apple App Store or Google Play Store, or go directly to perplexity.ai/mobile on your phone’s browser to find the correct download links. The app is free. Download and open it.

On first launch, tap “Sign Up” to create an account using Google, Apple, or an email address. If you already have a Perplexity account from the web, tap “Log In” and sign in with the same credentials. Your existing search history, Spaces, and subscription status will sync automatically once you are logged in.

If you are on a Pro or Education Pro plan already, the app recognises your subscription immediately. If you subscribed through the App Store rather than the web, your billing is managed through Apple, not through the Perplexity website. Keep this in mind if you ever want to cancel, as App Store subscriptions are managed in iPhone Settings, not at perplexity.ai/settings.

Step 2: Run Your First Mobile Search

Tap the search bar at the top of the home screen and type your question in natural language. Alternatively, tap the microphone icon to use voice input. For voice queries, hold the button while speaking and release when you finish. Perplexity processes the spoken query identically to a typed one.

The answer streams in within a few seconds. Sources appear at the top of the response as tappable cards. On mobile, tap any source card to open the original page in your default browser. The numbered citations within the answer text are also tappable. At the bottom of each answer, three or four suggested follow-up questions appear. Tap any of them to continue the thread, or type your own follow-up in the search bar below.

Step 3: Set Your Focus Mode Before Research Queries

Before submitting any research-focused query, set the correct Focus mode. On mobile, the Focus selector appears as an icon or label below the search bar. Tap it to open the mode options: Web, Academic, Social, Writing, Math, Video, and Finance. Select the mode that matches your query type, then type or speak your question.

For students using the app to research university topics, select Academic before submitting. For anyone checking product reviews or community opinions, select Social. For mathematical problems, select Math. The Focus mode carries through the entire thread, so set it at the beginning rather than switching midway.

Setting Focus modes on mobile takes the same three seconds as on desktop and produces the same quality improvement in answer relevance and source credibility. It is one of the most underused features among mobile users who tap search and go without adjusting any settings.

Step 4: Use Deep Research on Mobile

On Pro and Education Pro plans, Deep Research is accessible on mobile via the “+” icon next to the search bar. Tap it and select “Deep Research” from the menu that appears. Write or speak your research prompt, then submit.

A Deep Research session runs for two to five minutes in the background. You do not need to keep the app open during this time. Perplexity sends a notification when the report is ready. Open the notification to go directly to the completed report within the app.

On mobile, the completed Deep Research report displays in the same structured format as on desktop, with section headings, paragraph text, and numbered citations. You can scroll through the full report, tap citations to verify sources, and run follow-up queries within the same thread. Copying the report text for use in another app works through the standard long-press text selection on both iOS and Android.

Step 5: Upload Files on Mobile

Pro and Education Pro users can upload files to Perplexity threads directly from their phone. Tap the attachment icon next to the search bar. On iOS, this opens the Files app and Photos library. On Android, it opens your file manager and gallery. Select the document or image you want to upload. Supported formats include PDF, DOCX, XLSX, images, and audio files.

Once uploaded, ask your question about the file directly. This is particularly useful for students who have saved lecture slides as PDFs, professionals who have reports in their cloud storage, or anyone who receives a document and wants to extract specific information from it quickly without sitting at a computer.

File uploads from the mobile app count toward your weekly file upload allowance the same as desktop uploads. Files uploaded to a Space, rather than a standard thread, count toward the Space’s file limit separately. Uploading large files on a mobile data connection can be slow, so switching to Wi-Fi for large document uploads is recommended.

Step 6: Access Your Spaces on Mobile

Tap the Spaces icon in the bottom navigation bar to view all your Spaces. Tap any Space to open it and run queries within its custom instruction environment. All files uploaded to a Space on desktop are accessible from within that Space on mobile, and any queries you run within the Space on mobile appear in the Space’s thread history on both platforms.

Creating a new Space on mobile follows the same process as desktop: tap the “+” button within the Spaces section, enter a title, optional description, and custom AI instructions, then save. For initial Space setup with detailed custom instructions, desktop is more comfortable. For ongoing use of an established Space, the mobile experience is fully functional and equally capable.

[SCREENSHOT: The Perplexity AI mobile app showing the Spaces section with a Space open, displaying previous research threads within that Space and the search bar ready for a new query with custom instructions active]

Key Benefits of the Perplexity AI Mobile App

Full Research Capability in Your Pocket

The most significant benefit of the Perplexity AI mobile app is that it does not strip down the platform’s capabilities for mobile. Everything available on desktop is available on the app. Deep Research, Spaces, file uploads, Focus modes, Labs, voice input, and model selection on Pro are all present and fully functional on mobile. This is not common among AI tools, many of which offer a reduced mobile experience compared to their web platforms. The Perplexity mobile app treats mobile users as first-class users rather than a secondary audience receiving a simplified interface.

Voice Input Changes How You Research

The addition of voice input to a fully capable AI research tool produces a genuinely different research experience from anything available in a traditional mobile browser. Asking a complex research question by speaking naturally, receiving a cited answer in seconds, and following up with another spoken question creates a research workflow that is fast enough to use between tasks, during a commute, or in any situation where typing would be slow or impractical. For users in India where mobile-first usage is the norm, voice search in Hindi and other regional languages is supported alongside English, making the tool accessible to a wider audience than English-only alternatives.

Cross-Device Continuity Removes Friction

Research rarely happens on one device in one session. You start something on your phone, pick it up on your laptop, and want to continue on your tablet. Perplexity’s cross-device sync means the thread is always exactly where you left it regardless of which device you are on. With Comet for iOS, you can start researching on desktop and then pick up where you left off on your iPhone, with the thread staying tied to the page across devices so the context always carries over. This continuity removes the friction of emailing yourself links, copying text between devices, or recreating context in a new session.

The Comet Browser Extends Research Into Every Webpage

For iPhone users, the Comet AI browser extends Perplexity’s research capability beyond the app itself and into every webpage you visit. Users will notice the difference the first time they ask Comet to summarise a long article and then email the highlights without opening another app. This in-browser intelligence means the research tool is present everywhere you browse, not just when you deliberately open the Perplexity app. For students reading academic articles, professionals reviewing industry news, or anyone browsing topics they want to explore more deeply, Comet turns passive reading into active research without switching contexts.