Originally Posted by cities516
I also wants to know how it can speed up my download.
The speed boost is achieved by splitting the file into multiple pieces and downloading them all at once. Such an approach provides an overall speed boost for almost any download, however the best boost is achieved for servers that have an download speed limit per connection (those types of server aren't that uncommon - most big server have some sort of limit especially for non premium accounts).
For example if the server has a limit of 500Kb per connection and you use one connection for the download (like a normal browser does), then you only get 500Kb of max speed. However if you split the file into 10 pieces and use 10 connection, then you download speed is 500Kb * 10. Ofcourse if your internet speed is less then 500Kb then you won't see any boost.
Also I think that even if you don't achieve a boost for a certain file or server, then is still worth using this application as with this app you will never lose your downloaded data. If you battery dies in the middle of the download, then you can always plug in the charger press the download resume button and continue without loosing any downloaded data. Even a couple of hours later you can still resume your downloads (hell maybe even weeks if the downloads file doesn't change or gets removed from the server).