A chord is named, you play it on the guitar - the app listens.
Back to chordsCurrent settings: no time pressure
If your chord is not picked up, these are the knobs. The starting values come from computed examples, not from a real guitar.
Below this nothing is even looked for. Too high: quiet notes get missed. Too low: room noise sets it off.
How closely the sound must match the chord. Too high: nothing is recognised. Too low: a minor shape passes as major.
How much of what is heard must sit on chord tones. Too low: a single strummed string already counts.
In landscape you can see the whole fretboard. Upright it gets too narrow to practice.
As soon as you turn it, things carry on by themselves.