Basic Guitar Tuner is a free Android app developed by Eduardo Rojas Soriano. It falls under the multimedia category and is a must-have for all guitar players. The app is a simple tuner that provides users with the sound of standard tuning for the six strings of the guitar (E, A, D, G, B, E).

One of the app's unique features is the inclusion of a diapason sound of A-440 Hz/A-432 Hz, which makes it possible to tune other musical instruments. Experienced players can tune all strings of any tuning from this sound. It also includes sounds of the chromatic scale of C4 (middle C).

Overall, Basic Guitar Tuner is an excellent app for guitar players of all levels. It is simple, effective, and easy to use. The app is a great tool to keep your guitar in tune and help you improve your playing.