Guitar Tools Pro 4+

Guitar Tools Pro is a bundle of three app needs for learning guitar. Contains: Guitar scales and modes, Intervals and Arpeggios.
GuitarScales is an application for learning guitar scales and memorize the notes on the guitar fretboard. It contains chromatic, Ionian (major), harmonic major, Dorian, Phrygian, Lydian, Mixolydian, Aeolian (minor), Locrian, harmonic minor, major pentatonic, minor pentatonic, blues pentatonic, Hungarian Gypsy, Ukrainian Dorian, Acoustic, Persian, Algerian, Flamenco, Hawaiian, Chinese, Byzantine and Neopolitan scales.
Guitar Scales contains scales for standard, 1/2 step down, 1 step down, standard B, drop D, drop C and drop A tunings.
Highlight the whole fretboard to show which notes are within a chosen scale and a some positions (5 positions, 3 notes per string positions, diagonal positions) for each scale. Containing examples of the sound of scale and notes sounds. Optimised for all devices and tablets.

Guitar Arpeggios is app to learn arpeggios on guitar neck. It has arpeggios for standard and some drop tunings.
An arpeggio is a type of "broken chord" where the notes that compose a chord are played or sung in a rising or descending order. Arpeggios create a fast, flowing sound. Arpeggios always sound good over their matching chord in a progression, therefore, they generally form the melodic home bases and safe notes for improvising guitarists.

Guitar Intervals is an app to learn intervals on guitar neck. Click on the note to play it. It has intervals for standard and some drop tunings.

Intervals are the distances between any two notes. All harmonies or melodies can be considered as a sequence or layering of intervals. The quality of an interval can be Perfect, Diminished, Augmented, Major, or Minor.

All apps have right-handed and left-handed modes and can be useful for both novice guitar players and advanced players.