# GTK - Guitar Player's Toolkit — Tools for your guitar journey

> All-in-one guitar practice and theory toolkit with tuner, metronome, scales, and fretboard tools. (iPhone/iPad app by Jon Machtynger.)

- Source: https://appshunter.io/ios/app/gtk-guitar-players-toolkit/id6749509640 (this page in markdown: same URL + `.md`)
- Developer: [Jon Machtynger](https://appshunter.io/developer/1830842869)
- Category: Music, Education
- Price: $9.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 64 MB
- Languages: American English
- Released: 2025-08-19
- Data updated: 2026-08-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/gtk-guitar-players-toolkit/id6749509640/reviews.md

## What is GTK?

During the many phases of my guitar playing journey, I used a number of tools, theory books, tuners, metronomes, practice techniques, and information to help me get my head around some of the concepts like chord composition, triads, scales, modes, transpositions, or working out what a chord looks like on a fretboard.
Despite being a much better guitarist than I was, I built these tools because I still use them. Now you get to use them too.

The Guitar Player's Toolkit includes the following tools:

Chord Theory

1) Chord Master
 • A comprehensive chord library containing around 3600 chords.
 • Create custom chords
 • Know where to put the fingers, but don't know the name? Use this tool
 • Know the notes, but don't know the name? Use this tool.
 • Use the triad library to learn the finger positions across different string sets, inversions, and starting frets
 • use the key based diatonic progressions library to help with song writing and melody construction
 • All chords can be played with guitar accurate sounds to suit Nylon, Classical, and Steel strings.

2) Scales
 • Show notes across every key - major, minor, diminished, augmented, but also modes, pentatonics, blues, jazz, Arabic / middle eastern, exotic, symmetrical, Chinese, Japanese, Korean, and so on.
• Compare up to 4 scales, triads, or chords at once on a single, colour-coded fretboard in Scale Sharing, with shared notes marked and notes of interest highlighted.
• See diatonic chords for scales that have them (Major/Minor and modes, Harmonic Minor/Major, Melodic Minor), and explore a triad library across different string sets and inversions for any chord progression you build
• For scales with a diatonic chord sequence, toggle between the scale's note description and its chord sequence

3) Position Finder
 •  Want to play a scale in a specific key, but at a place in the fretboard that suits you?  
 •  Want to play without having to slide your hand up and down the fretboard? 
 • This tool shows you the notes in the scale, and where they sit on the fretboard around the fret you choose — so you can play in position without sliding your hand up and down the neck. Toggle between key context and mode context to quickly see how the same shape works across different modes.

4) Chord Transposer
 • Sometimes a song includes chords that you either don't like, or don't suit your voice. Use this tool to transpose all chords to a different key, or just recalculate them using a capo

5) Circle of Fifths
 • Invaluable for song writing - shows the relationship between keys and chords and also allows you to work with modes. 

6) Mode converter
 • Convert from one musical mode to another, in any key.

Practice tools:

7) Note Practice
 • Use this to learn where every note is on the fretboard
 • Set a tempo/pace to practice at. Choose the strings, notes, and enharmonic format, and you'll be given a note and a string number to play.
 • Hear the note and compare it to what you hear on your guitar. See the note on the fretboard to help you learn.
 • Start with a single string, and work up to string pairs or collections.

8) Triad Practice
 • Triads are 3 notes that make up chords. Learn these across string sets, and extend your mastery of the fretboard.
 • Like Note Practice - pick your chords, string set, type of chord (Maj/Min/Aug/Dim), an inversion (Root/1st/2nd), and a tempo.
 • Hear the chord/triad and compare it to what you hear on your guitar. See the triad on the fretboard to help you learn.
 • Start with a single string set, Maj/Min and increase the complexity in terms of diminished/augmented, and multiple string sets

Practical

9) Tuner
 • A chromatic tuner to identify what note is being played. Use this to tune your guitar to whatever tuning scheme suits you

10) Metronome
 • Provide a regular beats per minute and beats per measure. You can also manually tap a tempo to match a beat in your head.

## Key features

- Accurate chromatic tuner
- Adjustable metronome with tap tempo
- Extensive scale library
- Circle of Fifths for songwriting
- Fretboard position finder
- Chord and triad practice modules
- Chord transposer

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/gtk-guitar-players-toolkit/id6749509640/reviews.md

### 5/5 — Very useful app for beginners to music theory.

*2026-03-10*

Would love to see harmonic and other keys added to the position finder.

**Developer response:** Great idea. This has been added to version 1.4.1 (among other improvements)

## Frequently asked questions about GTK

### What is GTK?

GTK - Guitar Player's Toolkit is a paid application designed to assist guitarists with various aspects of their playing journey. It includes tools for tuning, practicing scales and chords, understanding music theory, and transposing songs.

### What tools are included in GTK?

GTK includes a tuner, metronome, scale finder, Circle of Fifths, position finder, mode converter, note practice, triad practice, Chord Master, and chord transposer.

### How much does GTK cost?

GTK is a paid application priced at $9.99. This one-time purchase grants access to all its features.

### Does GTK have ads?

No, GTK does not contain advertisements. As a paid application, it offers an ad-free experience for uninterrupted practice.

### What devices is GTK available on?

GTK is available on iPhone and iPad devices.

### How often is GTK updated?

The latest version of GTK is 1.4.3, and it was last updated on May 6, 2026. Updates typically include new features and improvements.

### What is the age rating for GTK?

GTK has an age rating of 4+, making it suitable for users of all ages.

### Can GTK help me learn guitar theory?

Yes, GTK includes tools like the Circle of Fifths, scale finder, and chord master that are invaluable for learning and understanding music theory concepts.

## Version history (last 5 releases)

### 1.7.4 — 2026-08-14

New Chords tab in Scales — Show notes from any chord name (type it in) and see all its notes across the whole fretboard, colour-coded per chord with pie-slice dots where two or more chords share a note and the root ringed. Draws on the same curated chord library as ChordMaster

### 1.7.3 — 2026-08-05

• New Scale Sharing tab in Scales - build a list of up to 4 scales and compare their notes on one fretboard, colour-coded per scale with pie-slice dots where two or more scales share a note.
• Scale Sharing bolds and colours each scale's {bold:root, 3rd, and 5th} in its notes list, and rings those same notes on the fretboard — a full ring on a solid dot, or just the relevant slice on a shared pie-slice dot.
• New Highlight Triad Notes toggle in settings under Scale Sharing lets you turn the fretboard ring highlight off for a plainer view.
• Triad Positions has moved from Position Finder to a new Triads tab in Scales, joining the Scale and Sharing tabs - it now shows chord tones across the full 24-fret neck (the fret From/To pickers are gone), with the fretboard scrolling horizontally and fixed string labels to match the other Scales tabs. Use the string-set checkboxes to focus the display. Your saved chord progressions carry over automatically.
• Position Finder is now a single, focused scale-position tool.
• Scales now shows a Diatonic Chords toggle for scales that have one (Major/Minor and their modes, Harmonic Minor/Major, Melodic Minor) — switch between the scale description and its diatonic chord sequence.
• Fixed Dorian, Phrygian, and Locrian descriptions in Scales, which previously showed a generic "Major scale" description instead of their own.

### 1.7.2 — 2026-07-21

• Fixed chord search so name are detected automatically when entering accidentals (#/b) in unicode or not - applies to Chord Library and the Custom Chords search box.
• New Contact Us option in settings under Support - opens your Mail app with a pre-filled template so you can report a bug, request a feature, or send general feedback.

### 1.7.1 — 2026-07-14

• Position Finder now shows a Key / Mode toggle when the fretted position isn't the key's own root. This allows you switch between seeing note degrees and colours relative to the key you're playing in (e.g. G) or relative to the {bold:matched mode} (e.g. A Dorian). If you're playing in G, you should still see the option to focus on G scale notes, even if it is in a different mode's position.
• Corrected several inaccurate fret/mode pairings in Position Finder's help sheet Practical Examples - the displayed notes and mode names now match what the tool actually calculates.
• Fixed the Chord Diagrams setting in Settings - it previously had no effect; now renamed 'Show Finger Numbers' and correctly toggles finger-number labels on chord diagrams throughout the app.
• New Marker Colour option (Cyan, Indigo, Mint, or Pink) appears in Settings → Chord Diagrams when Show Finger Numbers is off, letting you choose the colour of the plain position dots.
• Chord Library now shows a notice when your selected tuning isn't standard. Its chord diagrams are curated for standard EADGBE tuning and won't match alternate tunings like Drop D or DADGAD
• Chord Master's Build and Explore tabs now show your current tuning in the navigation bar, confirming that fretboard positions and note names are calculated for the tuning selected in settings.

### 1.7.0 — 2026-07-08

Many planned updates delivered:
• Redesigned fretboards - strings and frets now render like a real instrument instead of a grid of cells.
• New Fretboard Skin option — choose Dark, Walnut, Rosewood, Ebony, or Maple.
• Scales fretboard now scrolls across the full 24-fret neck previously limited to 12 frets, with string labels staying fixed in place as you scroll.
• Fret position markers (the inlay dots at frets 3, 5, 7, 9, 12, 15, 17, 19, 21, and 24) now appear consistently on every fretboard.
• Fixed bidirectional arpeggiation Up then Down / Down then Up) in Chord Master and Chord Library — turnaround note now plays correctly on both passes, and notes no longer prematurely mute.
• Fixed slight fretboard string name misalignment.

## Apps similar to GTK

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Guitar Chord Finder : Fabulus](https://appshunter.io/ios/app/guitar-chord-finder-fabulus/id1559087405) | 4.5 (70) | Free | Music |
| [Guitar Chords Compass Lite](https://appshunter.io/ios/app/guitar-chords-compass-lite/id1057927518) | 4.7 (48) | Free | Music |
| [Jazz ScaleHelper](https://appshunter.io/ios/app/jazz-scalehelper/id567707566) | — | $5.99 | Music |
| [TONALY: Songs, Scales & Theory](https://appshunter.io/ios/app/tonaly-songs-scales-and-theory/id1242467844) | 4.8 (6,323) | Free | Music |
| [Piano Chords, Scales Companion](https://appshunter.io/ios/app/piano-chords-scales-companion/id598574333) | 4.8 (1,315) | Free | Music |
| [ScaleHelper](https://appshunter.io/ios/app/scalehelper/id552735530) | — | $5.99 | Music |

## More apps by Jon Machtynger

- [GTK - Circle Of Fifths](https://appshunter.io/ios/app/gtk-circle-of-fifths/id6757976064)
- [GTK - Songbook](https://appshunter.io/ios/app/gtk-songbook/id6759207277)
- [GTK - Ukulele Player's Toolkit](https://appshunter.io/ios/app/gtk-ukulele-players-toolkit/id6785108945)
- [GTK - Banjo Player's Toolkit](https://appshunter.io/ios/app/gtk-banjo-players-toolkit/id6791771235)

All apps by Jon Machtynger: https://appshunter.io/developer/1830842869

## Related topics

[guitar tool kit](https://appshunter.io/ios/topics/guitar-tool-kit)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*