Xender is app which made for file transfer to one phone to another phone. Its only made for android base os only. The xender is directly give you option that you send you installed app apk file easily.
The speed of the file transfer is depending on the connectivity of two device. The one phone is tap send button and the other phone have to tap recieve. The recieve phone has open radar image in the phone screen and in that the phone which select send was shown and select it ro make the connection.
The new xender update is start the Bluetooth and hostpot to gether which is complicated for data transfer. If you turn of Bluetooth than it give high speed file transfer that is good.
The xender also have some market means buy using it you can make money easily. You can download new apps from the xender app and you get point for it. So this is the best app to transfer file as per my point of you this app is perfect.