GTK Player's Toolkit Get the app

GTK · Banjo

GTK – Banjo Player's Toolkit

Tools for your banjo journey.

Five-string or four, bluegrass or Irish tenor – the banjo toolkit understands drone strings, open tunings and the short fifth string.

Download on theApp Store See all tools
  • $9.99 one-time
  • Version 1.3.3
  • 23.6 MB
  • iPhone · iPad · Mac (Apple silicon)
G G E C E
C major, Open G (gDGBD)

Highlights

Made for banjo players

10,000+ chords

Across five 5-string tunings and three 4-string tunings, with whole or arpeggiated playback.

4- and 5-string aware

Fret counts and fretboards adapt to the banjo you choose.

Roots, 3rds & 5ths

Scale Sharing highlights chord tones so you can move between chords with the least effort.

Chord Library

Thousands of searchable, filterable diagrams with favourites.

Inside the app

See it in action

Chord Master on banjo in Open G with the Library tab selected. Dm is typed in the search box, with a count of 79. Five-string chord diagrams for Dm, Dm/A, Dm/F, Dm11, Dm11/E and Dm11/F are shown, with muted and open strings marked and the short fifth string drawn from the fifth fret. The tabs are All, By Key and Favorites.
Library: search for a chord and see how to play it on five strings.Chord Master guide
Chord Library on banjo in Open G, the All tab with an empty search box and a count of 919 chords. Five-string chord diagrams for A, A5, A6, A6♯5, A69 and A6♭5 are shown in a grid, each with a play button, a heart, an arpeggio button and the note under each string. The short fifth string is drawn from the fifth fret.
The All tab: 919 chord diagrams, each ready to play.Chord Library guide
Edit Chord on 5-string banjo: an E7 shape at the 2nd fret on the G, B and D strings with the g and low D strings muted; the short g string is greyed out below the 5th fret.
5-string aware: the short g string starts at the 5th fret.Custom Chords guide
Chord Build on banjo in Open G with the notes C, E and G switched on in red, green and blue. The name C is shown large, with Em3 and GP4 listed as alternatives at 67%. The five-string fretboard (D, B, G, D and the short g string) shows every C, E and G from the open strings to fret 6.
Select C, E and G: GTK names the chord C and marks every one of those notes on the neck.Chord Build guide
Chord Explore on banjo in Open G. A table lists the notes placed on the D, B and G strings: F♯ at fret 4, D at fret 3 and A at fret 2. The fourth string (D) is muted, with a red X, and struck through in the table; the short fifth g string is empty and shows dashes. The name D is shown large, with D/A at 100% and AP4 at 67% as alternatives.
Tap the fretboard: GTK names the shape you are holding, D, with the fourth string muted.Chord Explore guide
Chord Transposer with Actual Key C, Desired Key G and Capo on Fret 0. In the Chord Progression list, Instead of Cm, Dm, E7, E, G and Am becomes Play Gm, Am, B7, B, D and Em; the Capo column is empty and Effective matches Play.
C to G, no capo: Cm, Dm, E7, E, G, Am become Gm, Am, B7, B, D, Em.Chord Transposer guide
Scales on banjo set to the C major scale: the notes C, D, E, F, G, A and B with scale degrees 1 to 7, and their positions on the fretboard as colour-coded note names. The five strings are labelled D, B, G, D and g, and the short g string starts at the 5th fret.
C major across the neck, with its notes and scale degrees.Scales guide
Scale Sharing on banjo with four scales listed: C Major (blue) and A Minor (green) switched on, F Major and G Major switched off. The fretboard shows each note in one of the two colours, with dots split into blue and green pie slices where the scales share a note. The five strings are labelled D, B, G, D and g, and the short g string starts at the 5th fret.
C major and A minor: the same seven notes, so every dot is shared.Scale Sharing guide
Triad Sharing on banjo in Open G, the Triads tab, with only C (blue) switched on and only the 123 string-set box ticked; 234 is unticked. The fretboard shows the notes C, E and G as blue dots on the D, B and G strings and the short g string; the lower D string is empty.
One string set: with only 123 ticked, the lower D string is left empty.Triad Sharing guide
Chord Sharing on banjo, the Chords tab, with a box for entering a chord name and four chords listed: Daug9 (D, F♯, A♯, C, E), D7, Am7 and Emaj7. Only Daug9 (blue) is switched on. Its notes are shown across the fretboard (the four strings D, B, G and D, plus the short g drone string, which starts at fret 5), with the root D ringed.
Type a chord name, even an unusual one like Daug9: its notes across the neck, root ringed.Chord Sharing guide
Position Finder on banjo set to the key of G major at fret 5: the notes G, A, B, C, D, E and F♯, with their positions on the fretboard from fret 3 to 10 and coloured rings marking groups of notes to improvise around. Fret 5 is the root G, so there is no Key and Mode toggle and the title reads G-Ionian. The short g string starts at fret 5.
Song moves to G: its notes around fret 5, with rings to improvise in.Position Finder guide
Circle of Fifths with Key C and Mode Ionian. C is blue at the top of the wheel, F is red on its left and G is green on its right, with Am, Dm, Em and B° shaded inside. The centre of the wheel is empty because C has no sharps or flats. Below, Diatonic Chords in C Ionian lists I C, ii Dm, iii Em, IV F, V G, vi Am and vii° B° with the notes of each chord.
C Ionian: C major, with F and G either side and no sharps or flats.Circle of Fifths guide
Mode Converter turning C Dorian into D Phrygian, up 2 semitones, with the colour-coded notes and scale degrees of both modes.
C Dorian to D Phrygian: same notes, new home, up 2 semitones.Mode Converter guide
Note Practice on banjo asking for the note E on string 1, with the answer shown at fret 2 on the D string and a timer counting down.
String 1, note E: fret 2 on the D string.Note Practice guide
Tuner showing C♯ at 140.0 Hz, 17.1 cents sharp, on the needle gauge.
Needle gauge, cents offset and Hz readout.Tuner guide
Metronome at 120 BPM with four beats per measure, preset tempos, tap tempo and the current beat highlighted.
Set the tempo, tap it in, or pick a preset.Metronome guide

Everything included

16 tools, one app

Chords

Theory

Practice

Utilities

Tunings & fretboard

Fits your instrument

Chords
10,000+ chord entries
Scales
80+ scales in 14 categories
Frets
Up to 22 (5-string) · 19 (tenor)
  • 5-string Open Gg D G B D
  • 5-string Open G Low
  • 5-string Cg C G B D
  • 5-string Double Cg C G C D
  • 5-string G Modalg D G C D
  • 4-string TenorC G D A
  • 4-string Irish TenorG D A E
  • 4-string PlectrumC G B D

What's new in 1.3.3

  • Fret counts match the selected banjo (22 for 5-string, 19 for tenor).
  • Position Finder fret range fixed.
  • iPad splash logo fixed; refreshed icon and splash artwork.
Full version history on the App Store →
  • One-time purchaseNo subscriptions, no in-app purchases, no ads.
  • Works offlineEverything runs on your device. No account, no internet needed.
  • No data collectedAudio for the tuner is processed on-device and never recorded or sent.
  • Family SharingBuy once and share with up to six family members.
Download on theApp Store Questions? Read the FAQ

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