A free program for Android, by Real drums.

Drum Loops – Drum and Bass Beats is an application that contains a lot of different drum samples. You can choose from a variety of different sounds and apply them to different beats. You can change the speed of each beat to help you get a better grasp of the rhythm.

The application has an intuitive interface that will help you navigate through the many options. You can use the app for both practicing and for writing your own songs. It can also help you write your own songs.