It looks like popular walkie-talkie app Voxer is about to get some competition in the mobile voice chat space. A new app called Zello is growing like crazy, too – in fact, it’s growing faster than Voxer internationally (although it’s behind in the U.S.) and it has reached the #8 spot in the free Android social app list. The cross-platform mobile app just reached 1 million uniques per day, is… → Read More