Soi vs Black Tuner

Become part of the magic of creation and improvisation. Join in with friends, family, or anyone and make music together. Soi is an expressive instrument that allows for a group of any size to perform as an ensemble. Soi automatically harmonises and synchronises each of the participants to help everyone to feel engaged. There are no wrong notes!

Black Tuner is a quiet, precise tuner for guitar, bass and ukulele — free, with no ads, no subscriptions and no tracking. Pluck a string: it finds which one, shows how far off it is, and turns green when it's in tune. • Finds the string by itself, or lock one with a tap • Built-in tunings for 6- and 7-string guitar, ukulele and 4-, 5- and 6-string bass: Standard, Drop D, DADGAD, Open G, Open D, Eb Standard, Drop C, Russian 7-string and more • Your own tunings for any stringed instrument — a mandolin, a lyre, a harp: as many strings as it has, each set to its note and, if you like, to the cent • Capo: set the fret and tune with it on, where it pulls the strings sharp • Holds steady in a noisy room: a voice or a TV close in pitch doesn't drag the reading off the string • Reads 12th-fret harmonics; lock a string and fret the 12th to check intonation • Adjustable A4 (430–450 Hz) and in-tune tolerance (±1, ±3 or ±5 cents) • iPhone and iPad, works offline • The sound never leaves your device. For the curious, a shake opens a readout of what the tuner hears, with a live graph.