Ever felt the need to add prefixes to numbers? Well, even if you haven’t been (suffered!) through it, there is an app that can become lifesaver for those moments when you’re stuck in an awful situation where all your numbers are in local format but you need to add STD/ISD codes to make the call happen (it happens mostly when you’re out of local zone, right?). Well, Prefixer android app is all you need thence. Simply set a rule and every outgoing call from your phone will abide by – as easy as that. Have a look at it!