Very useful app for beginners to music theory.
Response from developer
Great idea. This has been added to version 1.4.1 (among other improvements)

This comprehensive toolkit offers a suite of essential features for guitarists, including a tuner, metronome, scale and chord finders, and practice tools. It aids in learning music theory, mastering the fretboard, and transposing songs.
1.7.4
August 14, 2026
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
MoreGreat idea. This has been added to version 1.4.1 (among other improvements)
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.
GTK includes a tuner, metronome, scale finder, Circle of Fifths, position finder, mode converter, note practice, triad practice, Chord Master, and chord transposer.
GTK is a paid application priced at $9.99. This one-time purchase grants access to all its features.
No, GTK does not contain advertisements. As a paid application, it offers an ad-free experience for uninterrupted practice.
GTK is available on iPhone and iPad devices.
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.
GTK has an age rating of 4+, making it suitable for users of all ages.
Yes, GTK includes tools like the Circle of Fifths, scale finder, and chord master that are invaluable for learning and understanding music theory concepts.