You can lock a chosen key, scale, position or practice pattern to meet your practice needs.

How it works:
Just press the RANDOM button to generate a random key, scale, position and practice pattern. You can see the finger position on the neck from the image on the upper area of the screen (the dark blue position is the key root position). 

Within the finger position, practice the scale pattern with the shown interval sets. If the scale practice pattern shows 3-1-3-5 and you are in the A-minor scale this would mean C-A-C-E. The scale practice continues with the same pattern but with a raised interval so if it shows 4-2-4-6, this means D-B-D-F. Now just continue until you use all the notes on the chosen scale.

If you just want to practice the Major Scale, press the RANDOM button until the scale shows MAJOR, and press the scale button to LOCK. The locked element does not change with the random button, allowing you to just practice the major scale.
Combine various locks with the RANDOM button to suit your practice needs.

Currently supporting:

Key:
C, D, E, F, G, A, B

Scale:
MAJOR, MINOR, HARMONIC MINOR, MELODIC MINOR

Position:
1, 2, 3, 4, 5

Scale Practice:
24 patterns

Thank you for checking out my app, I’m an independent developer and this app was created for my own practice purpose but I hope it works for you too. Feedback is greatly appreciated to make this app more valuable to guitarists looking for ways to improve their scale knowledge along the guitar neck.