Price: Free (or 69p if you don't want adverts, but they are very unobtrusive) Available on: iOS/Android You know those little magic eye puzzles you see everywhere (including on our App of the week ...

You’ll be a scanner in no time with this guide to getting the all-conquering QR codes ...

With over a decade of experience at Which?, Tom covers everything from tech advice to money-saving tips, and highlights the best deals during major sales events. Save article Set as preferred source ...