Perplexity 2.91.1

You ask a question in plain language, and it reads across the live web, pulls the relevant bits together, and hands you a short summary with numbered citations you can tap to check the original source.

The current Android release is version 2.91.1, free to download, and runs on most modern phones and tablets.

What Perplexity Actually Does - in Plain Terms

A normal search engine gives you ten links and leaves the reading to you. Perplexity does the reading first.

Type a question - "what's the difference between AV1 and H.265", say, or "is this medication safe with that one" - and it scans multiple sources, writes a plain summary, and footnotes every claim with a link back to where it came from.

Those little numbered citations are the whole point: you are never left guessing whether the AI made something up, because you can tap through and see the source for yourself.

It also remembers what you just asked. Follow-up questions build on the last answer, so you can keep refining without re-explaining the background each time.

There's voice input if you'd rather talk than type, and a Library that saves your past searches so you can pick a topic back up later.

Who Perplexity Is For - and Who Should Look Elsewhere

This app is at its best when you need facts you can trust and trace. Students gathering sources for an essay, anyone fact-checking a claim before sharing it, people researching a purchase, or just the curious who want a real answer with receipts - that's the sweet spot.

It's a weaker fit if what you actually want is creative writing, long coding sessions, or open-ended chat.

For drafting stories, brainstorming, or writing code, ChatGPT leans on a huge trained knowledge base and tends to feel more natural for that kind of work. If you want trending takes and social-media context, Grok plugs straight into X. And if you'd rather not pick one model at all, Poe AI puts GPT, Claude, and Gemini behind a single login so you can compare answers side by side.

How It Compares to Other AI Assistants

The mobile AI shelf is crowded now, and each app has a lane. Microsoft Copilot is built around the Microsoft 365 world - handy if you live in Word, Excel, and Outlook.

DeepSeek is free, lightweight, and strong at coding, though it stores data on servers in China, which is worth knowing before you install it. Monica AI bundles several models into one assistant for general task help.

Where Perplexity wins is plain to state: trustworthy answers with sources attached. When you need a fact rather than a paragraph of confident-sounding text, the citation trail is what sets it apart.

The trade-off is that the heaviest research tools - the multi-step Pro Search that breaks a big question into smaller ones and synthesizes dozens of pages - are metered on the free plan. Most everyday questions never hit that limit, so for the majority of people the free tier is plenty.

Good Reasons to Keep It on Your Phone

If you write papers, it pulls citable sources fast and links straight to them. If you share news, you can verify a claim in seconds instead of trusting a screenshot. If you build things, it gathers current documentation and community answers into one readable reply.

And if you're just learning something new, it gives you a structured starting point with a path to dig deeper through the sources it cites.

Installing Perplexity AI

Setup follows the normal Android routine. Tap the download button, and if your phone asks, allow installs from unknown sources, then open the file to install.

The app needs an internet connection to work, since all the searching happens live on the web. Create a free account and your history and saved searches sync across your devices.

Note on requirements: download mirrors list a minimum of Android 7.0 or 8.0 depending on the source, and the file size varies by build. Check the figures shown on the download page itself for the exact APK you're getting, rather than relying on a number quoted in an article.

If You'd Rather Have AI Built Into Your Browser

Some people prefer their AI assistant baked right into web browsing rather than as a separate app.

Comet Browser, made by Perplexity itself, embeds this same answer engine directly into the page you're reading. For a privacy-first option there's Brave Browser with its built-in Leo assistant, and Arc Browser offers AI-assisted page summaries and tab management.

On the desktop side, Opera Browser ships with its own AI helper alongside a free VPN.

To go deeper on how these tools stack up, our browser privacy guide walks through who's protecting your data and who isn't, and the Brave breakdown is a fair look at one of the more talked-about options. If you're weighing private search engines too, Qwant is the EU-built alternative worth a look.