Chord Transposer is a free Android app developed by Robert Süggel that allows musicians to transpose chords quickly and easily. It's especially useful for guitar players who need to transpose songs to a different key to suit a singer's range. The app allows you to type in the chords and instantly displays the transposed notes in the corresponding key.

The app is simple to use and has a clean interface. It's compatible with Android 9.0 and can be used on a variety of devices. The upcoming features include specifying the key to major/minor distinction, multi-language support, and a share feature. Overall, Chord Transposer is a handy tool for musicians who need to quickly transpose chords on the go.