The interface of Ukulele Toolkit is Tab based interface, which contains several functionality tabs.
 Tuner Mode: for tuning ukulele
 Rhythm Mode: including Metronome, Strumming and Drum Loops sub-modes
 Scales Mode: containing hundreds of useful scales.
 Chords Mode: including Chords by Note, Chords by key and Reverse Search sub-modes.
 Progression Mode: for learning and searching for more chord progressions.
 Settings Mode: advanced settings.
Sub-modes will be unfolded by long pressing the tabs, like the Rhythm and Chord tabs. We’ll discuss those functions in following chapters.