Concentus

Tune, learn and train your ear, on every string instrument.

A tuner, chord book and scale guide for guitar and 30 more instruments, from charango and cuatro to mandolin and bouzouki, plus ear training and vocal warmups.

concentus (Latin): harmony; music coming together.

Coming soon to the App StoreiPhone and iPad · English, Español, Português

One price. No ads, no account, no subscription. Nothing you play leaves your device.

The Concentus tuner showing an A string in tune

Everything a string player practices with

Built for players of every level, with a step-by-step guide on every screen and musical terms explained in plain language.

Chord shapes for A minor seven on guitar

Every way to play every chord

17 chord types in every key, with all the practical shapes for any tuning, easiest first. Tap a shape to hear it.

A minor pentatonic scale on the guitar fretboard

60+ scales, with their stories

Modes, pentatonics, blues and scales from Spain to Japan, each with what it sounds like, where it comes from and where you'll hear it.

A G major chord shape on charango

The instruments other apps forget

Paired strings, octave pairs and re-entrant tunings handled properly, so charango, cuatro and tiple chords come out right.

An ear training interval question answered correctly

Train your ear

Name intervals, chord types, scales and notes in a key, from beginner to advanced, with a tip after every answer.

A guided vocal warmup showing target notes

Warm up your voice

Find your range, then sing guided warmups that listen as you sing and climb through your voice a half step at a time.

The tuner screen

And the little things

Capo support, left-handed mode, a dim red Stage mode for dark rooms, string-change reminders, and Do-Re-Mi note names.

31 instruments, tuned and charted

Each with its standard tuning and common alternates. Don't see yours? Build it in the app.

  • Guitar
  • 7-string guitar
  • 12-string guitar
  • Baritone guitar
  • Tenor guitar
  • Requinto
  • Bass
  • 5-string bass
  • Ukulele
  • Baritone ukulele
  • Mandolin
  • Mandola
  • Octave mandolin
  • Banjo
  • Tenor banjo
  • Charango
  • Ronroco
  • Venezuelan cuatro
  • Puerto Rican cuatro
  • Cuban tres
  • Colombian tiple
  • Bandola llanera
  • Cavaquinho
  • Viola caipira
  • Irish bouzouki
  • Greek bouzouki
  • Balalaika
  • Violin
  • Viola
  • Cello
31string instruments
78scales, modes and arpeggios
4ear-training courses
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