There was a quick release of an iOS update by Apple at the end of last week, to address a vulnerability in the web browsing software that impacts all browsers on these devices.
iOS users: Patch now to avoid falling prey to this WebKit vulnerability | TechRepublic
Apple issues emergency fix for exploited WebKit security bug • The Register
These updates should come in automatically but for your cyber safety you must check to see they have been applied.
Not sure how to do that then one of the support team at Octagon Technology will be pleased to help you – no cost to you, just your time and a phone call.
Clive Catton MSc (Cyber Security) – by-line and other articles