Xender app provides easy transfer of large files and apps from one phone to the other in a jiffy.The user interface is user friendly.Sending files of Bluetooth is extremely slow and it comsumes battery as well, while using Xender is totally opposite.
It is a must for people who are impatient to wait for sharing the files wirelessly.The app is secure and needs authentication before sending and receiving.
Future enhancement which I would want to see is sending and receiving of files at the same time simultaneously.
I recommend people to use this app, it is available free on Playstore.