Safari limits tracking by default, but private browsing still has limitations. The iPhone's default Safari browser has gained a reputation for being private, especially as an alternative to Chrome. Safari blocks third-party cookies by default, uses machine learning to limit cross-site tracking, hides your IP address from known trackers and removes identifying info from certain URLs. In 2019, Apple published a white paper covering Safari's privacy capabilities.

All these features are important because advertising and data-broker networks (and by extension, the FBI) are itching to gobble up your private data. Safari helps by cutting most of these data leeches off at the knees, limiting the data shared with those networks and making it more difficult for advertisers to build an infrastructure based on your behavior.

However, "private" doesn't place Safari on the same pedestal as a quality VPN. Websites can still see info that's required to serve the page you're on, including a general idea of your location. Safari's defaults mean the average iPhone user is unknowingly handing over less data, but the browser is far from an impenetrable shield.

Safari's strongest privacy tools tackle address tracking as well as account security and unsafe website behavior. Its cross-site tracking protections try to stop advertisers and third parties from recognizing you as you move from site to site. Private Browsing adds a few layers, including blocking trackers, masking your IP address from known trackers and automatically removing some tracking info from links. Safari also supports passkeys, which let you sign in with Face ID or Touch ID instead of a traditional password. Passkeys are phishing-resistant by design because creating one is tied to a certain website; they won't work on a fake lookalike page. Apple Pay is also integrated into Safari, so you can avoid entering your card numbers and authenticate with Face ID to use your saved cards stored privately in Apple Wallet.

But for all the good Safari does, it still has limits (as all browsers do). While it will warn you about dangerous sites, it can't verify that every page you visit is legitimate and won't stop you from entering your credentials on a convincing phishing site. It will warn you about poor passwords, and while Apple Intelligence in iOS 27 will be able to automatically set stronger passwords for you, this feature isn't out yet. Private browsing doesn't hide your activities from your ISP or sites you're logged into, and anti-tracking tools reduce data collection but fall short of stopping websites from collecting data you submit directly. Safari can't protect you from what you decide to trust.

On an iPhone, the privacy differences between browsers can be smaller than their marketing suggests. Apple requires third-party browsers on iOS devices to use Safari's WebKit rendering engine (outside of the EU), so Chrome, Firefox and Brave can't use the same browser engines on iPhone as they do on desktop. However, there are still feature differences; PrivacyTests.org has an overview if you'd like to dive into a full comparison. Brave is a worthwhile alternative for those seeking a stronger content blocker. Its iPhone app promotes tracker and ad block...