GTK - Guitar Player's Toolkit
Tools for your guitar journey
$9.99 · Designed for iPad. Not verified for macOS.
During the many phases of my guitar playing journey, I needed or used a number of tools. These included books on theory, 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 chord voicings as well as the ability to create your own custom chords
• Know where to put the fingers, but don't know what the chord is called? This gives it a name
• Want to work out how to play a specific chord when you only have the note names? Shows all positions for these notes across the fretboard showing you where chords might sit and what to play
• A triad library shows you finger positions across different string sets, inversions, and starting frets
• A key based diatonic progressions library helps you 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.
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 multiple chords/triads reusing the shared notes?
• Want to play without having to slide your hand up and down the fretboard?
This tool show you the notes in the scale, and where they are on the fretboard in the place you want to play them in. Play them in the right key, and learn to use modes to quickly adapt to the position.
4) Chord Transposer
You often find a song that includes chords that you either don't like, or are too low or high for your voice. This tool lets you transpose all chords into a different key, or just recalculate your chords based on a capo position.
5) Circle of Fifths
An invaluable tool for song writing. This tool shows the relationship between keys and chords and also allows you to work with modes.
6) Mode converter
Allows you to convert from one musical mode to another, in any key.
Practice tools:
7) Note Practice
Want to learn where every note is on the fretboard? This tool gives you a way
• 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.
• You hear the note so you can 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 then work across string pairs or collections until it becomes second nature.
8) Triad Practice
• Triads are combinations of 3 notes that make up chords. Learning these across string sets, and extend your mastery of the fretboard, chords options.
• Similar to Note Practice - pick your chords, string set, type of chord (Maj/Min/Aug/Dim), an inversion (Root/1st/2nd), and a tempo to practice at.
• You hear the chord/triad so you can 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 beat per minute and peats per measure (e.g 3/4, 4/4). You can also manually tap a Tempo to match a beat in your head.
• 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.
The developer, Jon Machtynger, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jon Machtynger
- Size
- 66.6 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © (c) Jon Machtynger 2025

