Base na Viola is a free Android app developed by App Developer SM, which allows users to play guitar on their smartphone in a fun and interactive way. The app is designed to be user-friendly and easy to use.

To use the app, the user simply needs to click on the button corresponding to the desired guitar chord, and the app will start playing the corresponding strumming pattern. If the user knows the chord sequence, they can play along and create their own music. The app also offers a variety of different chords to choose from, so users can experiment with different sounds and create unique compositions.

Overall, Base na Viola is a great app for anyone who loves music and wants to learn how to play guitar in a fun and interactive way. The app is free to download and use, making it accessible to anyone with an Android smartphone. Whether you're a beginner or an experienced musician, Base na Viola is definitely worth checking out.