There are some great features baked into the iPhone and Mac ecosystems, many of which you will find in our iPhone tips and tricks and Mac tips and tricks features, but there is one feature in particular that you probably use on a regular basis without even realising. Autofill is a feature that brings the ability to save contact and credit card information in Safari so you don't have to re-enter the long card number, expiry date and security code every time you buy something on a website. It makes it significantly easier to buy things as you don't have to have your cards on you, but it does retain information even after it's perhaps not that useful anymore.