Yes — a high-quality antivirus app for iOS is the only way to block potentially dangerous connections and online attacks designed to compromise your data.
While iOS has excellent security, it’s not immune from online threats. Apple’s “sandbox” approach to apps means that an app can only execute in its designated space — it can’t infiltrate other apps to deploy viruses. This is top-tier security from Apple against viruses, but they are only 1 kind of online attack. Threats to iOS come from spam or phishing websites, hackers, adware and spyware, dodgy WiFi networks, and more.
A service like Norton protects your iOS device from web threats and theft and keeps your apps updated to avoid vulnerabilities — plus you can use it on multiple platforms to protect all of your devices.