Transpose Chords is a free Android application developed by QueAndroid that helps musicians to easily transpose their songs. With this app, you can increase or decrease the chords of your song by a half tone, simply by selecting the display mode for sharps and flats. Additionally, the app displays guitar chords, making it easier for guitar players to play along.

One of the best features of this app is its user-friendly interface. You can select chords notation in Latin or English and write the chords of your song in the old key, separated by spaces. The app also allows you to use the "m" letter for minor chords, "#" character for sharps, "b" letter for flats, and "7" number for seventh chords. After selecting the new key, click on the "calculate" button to display the song in the new key and the guitar chords. With this app, you can easily transpose any song in just a few clicks.