Fret IQ: Inversion Trainer

FretIQ is an interactive guitar training app designed to help you truly understand the fretboard through intervals, inversions, chord structures, and harmonic relationships. Rather than memorizing isolated shapes, FretIQ trains pattern recognition across the entire neck through a series of engaging quiz modes and interactive tools. Frets and string sets constantly shift, helping players move beyond fixed positions and develop real fretboard fluency. Features include: • Interval and inversion training games • Multiple quiz modes for different styles of recognition • Interactive chord and harmony catalogue • Triads, seventh chords, spread voicings, and advanced harmony • Real audio playback for notes and chords • Progressive difficulty and randomized fretboard challenges • Clean design focused entirely on learning — no ads or distractions Whether you are a beginner building fretboard awareness or an advanced guitarist refining harmonic visualization, FretIQ is designed to strengthen the connection between your ears, your hands, and the guitar neck itself. No subscription. No ads. Ever.