Duett is an Android application developed by Midimaster Software. It falls under the category of Education & Reference software. Duett is designed to support students playing musical instruments by providing a piano accompaniment.

The main focus of Duett is to provide a simple and clear accompaniment, rather than simulating a virtuous piano player. This makes it suitable for inexperienced musicians and children who want to start practicing immediately.

With Duett, you can enter a chord chain text, select a piano style, and set the tempo. The app will then play the accompaniment in an endless loop. You can also transpose the chord chain and adjust the volume ratio of the bass to the chord. Additionally, there is an option to turn on a metronome.

The free version of Duett offers "Major" and "Minor" chords, which can be played in 5 different piano styles. The tempo is adjustable in 10 steps, and you can create a new piano style and play it instantly.

For those looking for more features, the full version of Duett is also available. It offers additional chords, including all variations of Major, Minor, Aug, Dim, 6, 7, maj7, and 9. In the full version, you can enter chord chains with 2 chords per bar, save your chord chains for future use, and fine-tune the tempo and volume ratio of the bass and chord. Furthermore, you can create and save multiple piano styles.

Duett provides a user-friendly interface and includes a manual to guide users through its various features. Overall, Duett is a valuable tool for musicians looking to practice with a piano accompaniment.