This is the ultimate instruments guide for musicians, composers, songwriters, conductors, students and educators. It includes the registers, transpositions, playability, and sound characteristics of dozens of instruments. With this app, you can:

- Explore by family, alphabetically, or by score order
- See registers highlighted by difficulty and timbre
- Transpose with a simple tap
- See open strings, vocal ranges, timpani tunings for different sizes of drums, and more.

In this version:
- Woodwinds: Piccolo, Flute, Alto Flute, Oboe, English Horn, Eb Clarinet, Bb Clarinet, A Clarinet, Bass Clarinet, Soprano Saxophone, Alto Saxophone, Tenor Saxophone, Baritone Saxophone, Chromatic Harmonica, Diatonic Harmonica, Ocarina, Bassoon, Contrabassoon
- Brass: French Horn, Piccolo Trumpet, Trumpet in D, Trumpet in C, Trumpet in Bb, Trombone, Bass Trombone, Tuba
- Strings: Violin, Viola, Cello, Double Bass
- Keyboard and Percussion: Piano, Celesta, Glockenspiel, Marimba, Vibraphone, Fender Rhodes, Xylophone, Timpani
- Choral: Soprano, Alto, Tenor, Bass
- Operatic: Soprano, Mezzo-soprano, Tenor, Baritone, Bass
- Harp
- Guitar, Bass Guitar