There’s now one more reason to use imo instant messenger on the iPhone. With the latest update, the all-in-one chat app can now make voice calls over Wi-Fi, 3G and 4G between imo users. All that’s required is an iDevice running iOS 3.1+ (or Android phone) and some friends who have imo installed. Unlike other popular messaging apps on iOS (Whatsapp, Viber), imo lets you connect with friends from existing IM accounts, including Skype, MSN, Google Chat, Facebook, Yahoo and more. Other features include group messaging, voice IMs, persistent push notifications (1 week after app closed) and searchable chat history. One other cool thing is that you can head over to imo.im on your desktop web browser and do pretty much the same thing. If you haven’t checked out imo yet, it’s completely free well worth the space on your iPhone/iPad.
imo.im, imo instant messenger - Free