Whatsapp is a good and best app for chatting. it is really nice interface, it works finely. this app is absolutely free on android google play store. whats app concept is very good it really connects me with my friend altime. this app layout is very good and stylish. the feature of this app is calling feature, message privacy protection and many things like chatting, audio clip sent and document sent etc. so thumbs up for this app. it is very useful.