Every tuner here listens through your microphone and shows a real headstock for its instrument, not a generic dial — so the pegs you tap on screen match the ones you're actually turning. Guitar, Bass, Guitalele, and Ukulele cover the fretted-string family.
Violin, Banjo, Mandolin, Viola, and Cello handle the bowed and open-backed instruments, each with the alternate tunings that instrument's players actually use.