Answer:
the app they use is procreate.
Explanation:
hope this helped! have a great day!
-Red
We are already more than friends boiiiiiiiiii... BTW We are siblings. lol
yellow
ascending:
A, A#, B, C, C#, D, D#, E, F, F#, G, G#, A
descending:
A, Ab, G, Gb, F, E, Eb, D, Db, C, B, Bb, A
It goes by sharps ascending, and flats descending