Although rare, iPhone malware does exist. Your phone is especially vulnerable when it’s jailbroken, which opens up your device to application sources other than the App Store. Devoid of the usual restrictions, a jailbroken iPhone is as vulnerable as any Android device.
But even without jailbreaking your iPhone, you may still be exposed to security threats like identity theft, unsafe Wi-Fi networks, and phishing. This is why installing security software is always a sound idea.