I have to admit, all but the most basic strumming pattern here are above my head although I’d love to have seen ‘D DUD DU’ included with this app. The most complex I could do (and slowly at that) would be root/alternate ‘boom chuck boom chuck-a’. This boom-a business is just not happening.
What I CAN do, however, is to slow down the bpm and use it for walkups and walkdowns in different keys.
In addition, I’m also using it as a varying bpm backing track/metronome to practice different fingerstyle patterns in 4/4 and 3/4 timing. My notes include sample patterns, such as R123 (for strings 123) and R432 and so on. . .