Beatboxer is a free-to-use, fun app available on Android devices that allows you to create beatbox sounds and rhythms. The app features a simple interface with buttons that play different sounds, and you can select which beats to play them on. You can even change the beats while it's playing!

What sets Beatboxer apart from other apps is its 6-channel Beat Creator, which lets you create your own beats and choose from a variety of sounds. You can also save the beats you've created and play them back later. Additionally, you can beatbox along with any tune of your choice playing on a loop, and you can choose which tune to play from a list of mp3 files stored on your SD card.

Overall, Beatboxer is a great app for anyone who wants to create their own beats and experiment with different sounds. However, it's worth noting that the app contains third-party advertisements. If you're looking for a similar app with even more features, JCI Software also offers My Beat Creator, which allows you to create 4/4 beats and choose from a wider variety of sounds.