I have been using imo for the past few days. If I talk about the concept then the concept is very simple. Emo is an online video voice message chatting app. Layout and design is also not very special. A simple look is available which makes it easy to use. It has certain features like video calling through which we can call and talk to any of our acquaintances in any country. Emo is not very useful but good, its easy to use. There is a problem in which I have a lot of irritation if the network is a little less then I can not make a video call.