What is the best browser for iPhone?

The best browser for iPhone adds what Safari leaves out: Sigma brings AI chat, a built-in ad blocker, and one-tap Incognito browsing, all free.

How do I change my default browser on iPhone?

Open Settings, scroll to Sigma, tap Default Browser App, and select Sigma. Links from other apps will open in it automatically.

How do I turn on private browsing on my iPhone?

In Sigma, tap Incognito mode on the start page: the session stays separate from your main browsing and disappears completely when you close it. One tap on, one tap off.

What is the most private browser for iPhone?

Look for Incognito browsing, tracking protection, and open-source code. Sigma ships all three, plus a built-in ad blocker that cuts trackers.

Is there a browser with a built-in ad blocker for iPhone?

Yes, Sigma includes a free ad blocker on iPhone. Pages load cleaner and faster, with no extensions or separate apps.

Is Safari the best browser for iPhone?

Safari is solid and deeply integrated with iOS, but it has no AI chat or ad blocker built in. Sigma adds both, free.

Is Sigma Browser free on iPhone?

Yes. Sigma is free on the App Store, including AI chat, chat with page, ad blocker, and private mode.

Sigma Browser para Mac

Un navegador web rápido y privado para Mac con IA integrada. Descarga gratuita para macOS.

Descargar para macOS

Sigma browser on two iPhones: a movie page and its Sigma AI summary

The best browser for iPhone combines privacy, an ad-free web, and smart features like AI chat. That's exactly what Sigma brings to iOS.

AI

Ask AI right where you browse.

AI Chat answers and writes in any tab, and Chat With Page turns any article into a conversation.

Incognito mode start page with toggle in Sigma browser

Privacy

Private browsing, one tap away.

Switch to Incognito mode and your history and cookies vanish the moment you close the tab.

Ad blocker

An ad-free web, out of the box.

The built-in ad blocker cuts ads and trackers on every site, no extensions needed.

Sync

Your AI chats, on every device

AI Chat syncs across your devices: ask on your iPhone, continue on your desktop, and never lose a conversation.

AI chat

AI Chat in Your iPhone Browser

Sigma puts AI chat right in your iPhone web browser: ask questions, summarize articles, and chat with any page. No separate apps, no subscriptions.

Learn more about AI Chat Learn more about Chat With Page

Privacy

Private Browsing on iPhone, Done Right

Incognito mode start page in Sigma browser on iPhone

Sigma is a private browser for iPhone with Incognito mode built in: open an Incognito tab, browse what you want, and the whole session disappears when you close it. Private browsing on your iPhone takes one tap, right from the start page.

Learn more about Private Browser

Ad blocker

Built-In Ad Blocker for iPhone

Sigma ships with a free ad blocker for iPhone: pages load cleaner and faster, trackers are cut, and you don't need extensions or separate apps.

Best Browsers for iPhone Compared (2026)

Sigma

Safari

Chrome

AI chat built in

Chat with any page

Built-in ad blocker

Private mode searches with DuckDuckGo by default

Free

Sigma is the iPhone web browser that blocks ads, protects your privacy, and answers your questions. All free.

Cómo instalar Sigma Browser en un Mac

Sigma AI Browser listing card on the App Store with Get button

1

Descargar para macOS

Consigue el navegador web gratuito para Mac — no necesitas cuenta.

Make Sigma default toggle over the iPhone dock with the Sigma app icon

2

Instálalo en segundos

Abre el archivo y arrastra Sigma a Aplicaciones, como cualquier app de Mac.

AI chat in Sigma answering a Lisbon trip question with web results

3

Ponlo como predeterminado

Configura Sigma como navegador predeterminado de tu Mac en Ajustes del Sistema — o desde los propios ajustes de Sigma, en «Navegador predeterminado».

Download Sigma Browser

Download for iOS

Other platforms

Also available on macOS, Windows and Android.

Preguntas y respuestas

Si tienes alguna pregunta,
escríbenos en X a @Sigma_Browser

Sigma Browser para Mac