I find QR codes incredibly useful on sites like Android Lib which allow you to search for an app and then simply install on your mobile by scanning the code. Everywhere else? Can say I’ve ever scanned one. But on a flyer, as a link to a google map? Probably, but only if you indicate that’s where they’ll end up.
“There are plenty of Android applications available in market which will allow you to fix any error, code testing and managing your files, Here compiled a list of these 20 Android applications which are free and best suited for Freelance Web Designers and developers.”