I want to do a project where i control a robotic arm with an android application.
I saw that the AL5DCU-KT has a usb connection and i was wondering if i can connect my android device directly to the BotBoarduino and write an android application that moves the arm?
Yes, you can do that if your Android phone has a USB host-type port: you will need a special USB cable to plug into your phone, if you do not already have one.
The AL5DCU-KT version of the AL5D series includes a BotBoarduino, which means you can connect your Android to it much like most other Arduinos. This reference may be a good place to start: