ShareIt uses WiFi direct concept or WiFi hotspot to transfer files b/w devices. It actually creates a server of files i.e. your device and the network i.e. WiFi hotspot or direct. And since there is no data connection required it uses the max speed of your WiFi. It has a great layout and design.
This is an application specifically suited for moving files around with ease and speed, while many of its additional features only expand its capabilities. While there is much to say about SHAREit’s great functions and features. It is simple to use, very usefull and supports all android phones with any ROM.