I have been using shareit from more than an year for giving or taking apps, movies, files etc. This app is so convinient to use that without pairing or connecting to a person you can share files in seconds.Like a 50 MB file take almost 20 seconds to share and 1 GB file take almost 5 minutes to share. Moreover it is very easy to find someone near us.Though it acts like bluetooth but it is very faster than it. The best part about it is that it transfer files without the use of internet or any type of connections.