In most standard home setups in 2026, a guest on your WiFi cannot see your browsing history, but the reverse is actually more likely. When a guest connects to your network, their device is isolated from your personal device's local storage where your browser history is kept. However, the WiFi owner (you) theoretically has access to the router’s "admin logs," which can show which websites (URLs) are being visited by any device on the network, though most consumer routers don't make this easy to read. If you are the guest, the owner generally cannot see what you do inside an app (like specific messages) if the app uses encryption, but they can see you are using that app. For the host, your history remains private because it is stored locally on your phone or laptop. If you are concerned about privacy while sharing a network, using a Virtual Private Network (VPN) is the gold standard; it encrypts all traffic from your device so that even the router administrator only sees jumbled data rather than specific website names or search terms, ensuring total privacy for both the host and the guest.