The app plays a short blues phrase — then it's your turn to answer on the guitar. Trade licks back and forth as the difficulty ramps up. Everything sits in one pentatonic box so you always know where to play.
Listen while the amber phrase plays (the “call”). When the badge turns teal and says Your turn, answer with your own lick over the metronome — same length, same box. It doesn't grade you; the value is the constant back‑and‑forth that trains your ears and hands to respond in real time.
Everything lives in the box‑1 minor pentatonic + blue note shape shown on the fretboard (the highlighted dots), so you can always find a home note. Start on Easy or Auto, keep the tempo comfortable, and don't worry about copying the call exactly — reacting is the whole point.